Take things slow, just have her strip naked.

After giving the appearance of thinking it over, you tell your mom, “For now, just strip naked, okay?” You don’t want to press too hard against her foundations...not yet at least. You sit there, waiting patiently, for her to do as you say.

She lets out a small sigh, but starts taking off her clothes. Soon, your mother is standing there, completely naked, her clothes on the floor. “Thank you for choosing this over...something else, son.” Instead of immediately responding to what she’s said, you unzip your pants and take your cock out, already hard, so you can begin stroking it.

Your mother looks wonderful. It’s clear age has had some effects on her beauty, but you would never say it’s marred it. Her large, soft breasts droop more than you’re sure they used to, but they still look gorgeous, as do her large areola surrounding her thick nipples. You idly wonder if you suckled on them now, all these years later, if they’d still produce milk. An experiment for another time. Her stomach isn’t quite as toned as Kelly’s, pooching out a bit past her midsection, but you find that sexy as well. Your mother is a healthy woman. “Turn around,” you tell her, and she obeys.

Her ass is probably your mother’s best feature. It’s wide, round, and each cheek is as large as a soccer ball. Despite that, it’s toned, smooth, and perky enough to hold up items like a shelf. You stroke yourself faster, staring at it. You’ve always loved your mother’s butt, and soon you’ll do things to it you could only do before in your dreams. It’s imagining what you’ll do to it in the days to come that sends you over the edge, your cock spasming as a spurt of jizz flies through the air and lands directly on one of your mom’s ass cheeks. For a moment, you swear you see something change in your mother’s eyes, though whether it was real or wishful thinking, you don’t know. She looks at the stain on her, clearly not happy to be cummed on, especially by her son.

But you own her, so her thoughts don’t particularly matter, do they? “Go get some toilet paper. Clean me up, and once that’s done, you can wipe that off of you.” Your mother obeys, though doesn't look too happy about it. Still, she carefully wipes all the cum off of your crotch, then quickly does the same for her own butt. But that was just getting her help to cum once, right? What are you going to do for the second time?