Mother-in-law

My eyes shot open and I looked up to see Sandra setting on the toilet, completely naked. Up close with the lights on, her body was still a match for her youngest daughter's.

"You don't have to quit, dear," she said with a smile. "We just finished having sex and I really had to pee. I mean like I was going to pee in the bed if I didn't. Wouldn't be the first time, just the first time it was an accident."

I was frozen, staring at her with my cock still clutched in my hand.

"Really, please don't stop, I finished peeing a couple of minutes ago and was just watching the show," Sandra said. "You might be surprised, but its really a turn-on to watch men jerk off. And its been a long time since I got to watch anybody but Charles in person."

She looked me up and down, then smiled some more. It was odd yet still somehow a turn-on. This was the same sweet woman who baked me cookies for my birthday and mailed out cards for every imaginable holiday. And she spoke about watching me masterbate with the same innocent grandmotherly-like way.

"You can do it, Alan, its only natural," she said. "Don't be embarrassed. We all do it. Would it help if I did it to?"

Sandra reached down and lifted one of her boobs. Without breaking eye contact, she put a nipple in her mouth and started to suck on it. I'd be lying if I said it wasn't the hottest thing I'd ever seen.

I started slowly stroking my cock again.

"Good boy," she said as she switched from one nipple to the other. Her hand that wasn't supporting her breast slid down her stomach and between her legs.

If I hadn't just cummed inside of Marcie, I wouldn't have lasted long, but as it was, I felt like this could go on all night long.

Sandra released her nipple and adjusted her position on the toilet, sliding her hips forward so that her hairy pussy was now on display. She slid a finger from one hand inside her and rubbed on her clit with the other.

"Isn't this fun?" she asked. "I'm impressed you haven't finished yet. "Do you last this long in bed?"

"Sometimes."

"I think my daughter did pretty well for herself then," Sandra said with a smile. "Let me help a little."

She slid off the toilet with cat-like grace and dropped to her knees. She turned so that her ass was facing me, then looked back over her shoulder as she bent forward. In that position her cheeks parted, giving me a great view of her pussy and asshole from behind.

"Is that better?" she asked.

"Thats amazing," I said.

"Wouldn't you like to slide into me from behind?"

"Yes."

I was now stroking frantically but didn't feel any closer to finishing.