It smells like sex in there

Your mother walks in, carrying the stress of the day on her shoulders, when she catches a whiff of something in the air that fills her with a sense of nostalgia and warmth, like chestnut flowers, then embarrassment as she remembered what usually causes this smell. She pretends not to notice while you preempt any questioning.

"Hi mom, shoulders bothering you again? I could give you a massage."

"You're so sweet lately. I would love that."

She takes off her jacket and lays facedown on the very couch you took your sister on and you begin rubbing her shoulders. Her face is close enough to your crotch that she couldn't escape the scent even if she wanted to. It has literally been years since she's smelled this, let alone felt a man's...she tries not to think about it under these circumstances. Save it for later.

"Is this feeling good?"

"Oh yes. You can move onto my back now."

As your hands move down, she lets out an innocent moan. You unhook her bra through her shirt for smooth access to her back and she gets a little self-conscious. She thinks about how she wouldn't have given this as much thought if it weren't for that awkward moment where she saw your...oh the image won't leave her mind. She doesn't know if it was hard then because you were expecting her or not but she really hopes you won't pop a boner now.

"So, have you met any nice girls lately?"

You think 'naughty' would be the better term truthfully, but you can't talk about that.

"Not really, though maybe I should get around to it soon."

"Yes, that would be good for you."

As there's a stir in your pants, she really, really hopes you're thinking about it and not her, but doesn't want to stick around to find out.

"I'll go relax in my room now. I'll make p-pasta tonight. Excuse me."

She went holding her chest with one arm as her bra was still loose. Anita came out clothed with the towel on her hair.

"You didn't do anything to make her suspicious did you?"

"Of course not, why?"

"You reek of cum. Does she think you jerk off out here?

"I didn't notice. She didn't say anything during the massage."

"Massage? Oh her face might as well have been buried in it. Wait, did you do anything weird to her?"

"What do you mean? She's my mother."

"And I'm your sister. God, do you have a taboo fetish or are you just a tit-man? Just because they're the biggest you've seen."

"Second biggest."

"Oh, am I learning a detail about the mystery woman who made you a man?"

Certainly you thought she was at first, until it turned out technically speaking, Eileen had it before her mother.

"No, it was someone in the mall running a new store, a milf with H-cups."

"There was a rumor about a new store in the mall, but it seems it went as quickly as it came. If she was like that, then so much for sex sells huh?"

And there it is. The store that wasn't there yesterday trope comes full circle. She probably only stays in one place long enough to drop off new progeny. Her plot needs investigating, that's for sure.

"Anyway, I'm going to prepare for the sleepover. You try not to screw the family tree behind my back."

"I got it, you want to watch."

She makes an 'I'm warning you' gesture and walks off. On your way to your room, you hear noises coming from mom's room. You go into your own room and retrieve Eileen.

"I need you for a spy job."

"Say no more, I can hear her diddling herself from here. You need a fly on mommy's wall? That can be arranged."

She becomes so literally and you get hard in anticipation. She takes her sweet time coming back with news, turning from a fly into a reenactment of what she saw.

"Oh yeah, fully nude, vibrator and everything. She must be riled up to not keep quiet like usual. You just can't help yourself can you, you sexual beast."

She smirks like the Cheshire cat, before turning the 'vibrator' into a condom package.

"So, you want me to get in here so we can get in there, or do you just want me?"