Suggest you all head up to the bedroom and get naked

"I think it's time we moved things along, don't you?" you hint.

Maria nods quickly. "Would you like to come up to the bedroom?" she asks. She and Carson lead you upstairs to the master bedroom, which is nicely furnished, with a king-size four-poster bed.

All three of you start to disrobe. You watch Maria take off her silk blouse and knee-length pleated skirt. She's dressed in simple but high-quality black satin underwear. Carson helps her unhook the bra, revealing high-set, large C-cup breasts. She turns around and wiggles her ass teasingly as she slowly drops her panties. Her butt is bigger than you thought, ripe, slightly muscular, and a bit wider than her bust. All in all, she looks like a girl who keeps in excellent shape, but is blessed with a fuller figure by nature.

You shed your shirt, revealing your muscular torso and defined abs, then drop your pants and boxer briefs. Your cock come swinging out, almost fully erect, and Maria's hand goes over her mouth in shock. "Fuck me," says Carson quietly. You look over and notice that he too is naked. His little member is fully erect...and barely four inches long. He has pretty puny balls, too. No wonder Maria's dissatisfied--small cock, weak orgasms--you'll bet he's a premature ejaculator, too. Perfect. This boy was born to be a sissy.