It's going to hurt. Tomorrow with every step she takes, she will feel it. Not pain, not really. It'll be a stiffness in her legs, an awkward gait. It'll be a reminder of how the muscles of her inner thighs were stretched just past their limits. But the discomfort will hardly matter, because tonight the pleasure feels so good.
And, yeah, part of that's the obvious. He is so big and hard inside her. He fills her completely and he's found a rhythm that coaxes her g-spot to life.
But it's not just the obvious. It's everything. Everything feels good.
It's the way her legs are spread apart, strained past their limits, wrapping around him as best they can, pulling him closer. It's how her toes point, her calf muscles flex. It's the way her thighs take the impact of each one of his thrusts.
It's how the sheet tangles under and around her, how it's slipped off one corner of the mattress. It's the way the bed creaks, how it knocks against the wall. There's no mistaking the sounds, the rhythm.
The neighbors must know what they're doing.