Andrea spreads her legs apart and begins to rub the outsides of her thighs with her hands and says, "I want you to know that I have been working these legs of mine out a lot since you were last here. I think they've actually gotten a little bit stronger."
You gulp as you look at the intimidating size of her large muscular thighs, barely contained within the black leggings she wears, and say, "well, uhm, I do think they look a little bit bigger, but I'm not really sure."
Andrea smirks and says, "well I have squeezed your head with these legs of mine before. Why don't you come here and lay your head between them. Then you can tell me if they feel any stronger than you remember." She finishes her statement with a little wink and a sly smile.
You sigh, knowing that her suggestion is really more of a demand, and as frightening as her thighs are, you know deep down that you wish to have your head crushed between them, so you walk over and turn around as you sit down between her legs and lean your head back a bit between her tree trunk thighs. Andrea places a hand on your head and slowly pulls it further back until it is rested on her crotch, and then slowly begins to close her legs, and finishes by crossing her ankles. She hasn't started squeezing yet, so you savor the warmth and feel of her muscular thighs closing around your head and face, and to your surprise, they do indeed feel slightly more muscular than you remember, though it's hard to tell completely with them still being covered by her leggings. Then you can feel them slowly start to harden around your head as she begins to gradually increase the pressure, and soon enough you feel a familiar skull crushing pain swell around your head and face. It gets to the point where you feel as though you might actually pass out from her powerful legs, but just as you are about to drift into unconsciousness, she eases the presser, and you get a quick second to breath. The breath is short lived though, because then she begins to repeatedly flex her thighs, making them pulsate around your tiny little head. The rythim of her technique keeps you from passing out while simultaneously sending little shocks of pain directly to your head with her short yet powerful squeezes, and Andrea can't help but chuckle at the sight of her step son's head being pulverized between her powerful thighs.
After about a minute of this, Andrea releases her hold by spreading her legs, and you slump a little bit with relief, resting the back of your head on her crotch and looking up at her smiling face.
"So," says Andrea, "do they feel any stronger?"
You're still not completely sure, but part of you feels that her legs have indeed gotten stronger, so you reply, "I could be wrong, but I think they really are a little bit stronger. It's kinda hard to tell."
What happens next?