She grinned again, released his cock, and told him.

"Turn around and get on all four, dear."

He followed her direction, curious about what she planned to do. He was now facing away from her and even turning his head completely didn't allow him to see much of anything behind him. She then opened his legs to a level she felt was correct. He heard the same noises as when she used her cunt to lubricate her hand and soon felt her right hand grabbing his penis again and giving him another well-lubed handjob. She did this for a few seconds before he sensed her other hand touching his left butt cheek and pulling it open. Finally, he felt a wet sensation on his asshole, going up and down on it. Realizing what it was, Benjamin trembled in surprise and embarrassment.

"Grandma!?"

She stopped what she was doing except for her handjob, and answered.

"Relax, darling. It's a bit surprising at first but you will enjoy it very soon."

"But it's dirty!"

"I can say the same thing that you told me. There is nothing dirty about you, dear."

He did not argue his own words and she went back to lick his asshole, slowly working on his puckered opening. It still was an odd sensation and Benjamin took some time to get used to it. After a few minutes, he managed to relax a bit and appreciate the feeling of wetness. It didn't feel amazing but didn't feel bad either and she was careful to make it as pleasant as possible.

When she sensed that he was used to it and relaxed enough, she gently inserted her tongue in his ass, pushing it as far as she could, and he couldn't help releasing a small shout at this. The first thing that Benjamin felt was his body's alerts and warnings. Something was entering him not only at the wrong place but also going the wrong way! He instinctively used his ass muscles to push the intruder out and, feeling the pressure, she let her tongue be driven out, as if she had anticipated this response from him from the start. She went back to lick his hole and when he got relaxed again, she made another try. Ready for it this time, he bore the intrusion for longer before he pushed her out again.

She was patient and repeated this several times until he eventually didn't reject her anymore. At this point, she grunted with satisfaction and started her work on his ass seriously. She licked his insides, close to the hole, then further, little by little. She twirled her tongue, stimulating and relaxing his creases, tasting everywhere inside his back end. She even hardened her tongue and took it in and out of him, literarily tongue fucking his ass.

Benjamin had started by feeling very weird with the sudden attack on his ass. However, slowly, he had gotten used to it and was now finally able to completely enjoy his first rimjob. His grandmother was very skilled and she knew exactly what to do to make it feel good. Now that the uncomfortable part was over, he had to agree with her: it felt amazing indeed. His ass being rimmed gave a hard-to-describe feeling, completely different from his dick being masturbated, which she was also continuing to do without any change. It was like being tickled but with a much stronger stimulation, like a massage on a very intimate and sensitive place with the pleasure going straight to his brain, addicting.

The double stimulation on his cock and asshole didn't allow him to last very long and soon enough the pleasure went up, much stronger than usual.

"It's amazing, Grandma! I am going to come!"

She buried her head in his ass, her tongue twirling deep inside to stimulate him while moving the hand on his ass cheek away from it. She put her now free hand in front of his penis, just in time for his ejaculation, to catch all his released semen.

Benjamin felt greater pleasure than usual, his orgasm so strong that his view turned white for a second. His dick pulsed strongly and ejaculated waves after waves of spurts at full strength. He groaned loudly through the release, his grandmother never stopping her work until he was completely done.

Once it was over, she ultimately came out from his ass, grinning happily at the result. Benjamin turned around and witnessed her licking the semen in her hand and gulping it deliciously. After there was nothing left, she commented.

"Everything about you tastes delicious, love. How did it feel?"

"It was incredible. I never came so hard before."

"Ahahah, good, told you so."

They relaxed in the water for a minute before he declared.

"It's your turn now, Grandma."

She looked at him, intrigued.

"What do you mean?"

"Well, of course, I will do what you just did."

"What? Are you sure? Men usually don't like doing these sort of things too much."

"That goes without saying. Anything you do to me, I should do to you too. It's only fair."

She watched him, surprise in her eyes, before giving a big smile.

"Believe me, dear, you are perfectly right but it's definitely not the norm. People are selfish and that applies even between lovers. There are too many people who would gladly receive but never give back. I hope you never lose that mindset. If everyone thought like you, the world would be a much better place."

She turned around and got on all four, just like him previously. He now had a good view of her asshole, which had been hidden so far because she was always sitting. Just like her pussy, it was quite deep colored and also protruding somewhat, as if it had seen a lot of usage outside its normal function. As an amateur in the domain, he decided to only focus on her asshole for the time being. He put his hands on her butt cheeks and pulled on them to get better access. He then took his tongue out and started licking. It didn't taste much of anything, just a taste of flesh, and also didn't smell much. It seemed she was extremely clean back there.

She reacted very well to his licking, completely accepting it. Benjamin licked a bit more but feeling that she was taking it without issue, he soon inserted his tongue inside. It went in easily, encountering little resistance. When he was in, she didn't get any reaction of rejection like he had gotten and accepted him unconditionally. It seemed that she was somehow very used to these sorts of things. She only let a barely audible sight of pleasure and that was it. Benjamin was able to taste her insides now and it wasn't dirty in any way. It tasted a little bit bitter but was otherwise fine, almost enjoyable. He started moving his tongue around, imitating what she did previously.

"That's good, love. You're doing well. Your tongue feels great."

She encouraged him and he continued like this for some time. However, he got the feeling that she wasn't extremely stimulated with only that and decided to give her more. Her gushing pussy was right under her asshole and became the most obvious target. He removed one hand from her cheeks and began to finger her cunt. She felt what he was doing and became excited again.

"That's right. Don't be afraid and work my pussy too, just like before."

He added more and more fingers and soon enough, he was fisting her again. Now, she was really feeling it and the double stimulation also worked her up a lot.

"Ooohhh! You're great, love! Go ahead, destroy my old pussy with your arm!"

He accelerated his speed and started to pump her twat at full speed once more, to her delight. At the same time, he was careful to keep rimming her ass with his tongue, to give her as much pleasure as possible. It didn't take long before she was ready for another good orgasm.

"Just like that! Just like that! Oooohhhh! It's perfect! I'm coming again! I'm cumming! Oooooooooohhhhhhhhhh!"

Benjamin did the same thing as she had done before, releasing his other hand from her cheek to put it in front of her pussy. She climaxed, trembling and her pussy contracting while she began to squirt again. Her ass twitched and almost ejected him from inside her but he managed to barely stay in, stimulating her until the end. His hand in front of her cunt managed to harvest a small amount of her squirt while obviously letting most of it fall in the bath water.

She took a few tens of seconds to calm down and when she did, Benjamin removed himself from her ass and pussy. She turned around, only to see him drink her squirt. She laughed at the sight, which she had failed to notice the previous time.

"You're even doing something like this?"

"Of course, because it came out of you. It tastes amazing, you know."

"Ahaha, thank you, darling."

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