Try to be more forward.

You scoot closer to Sadie, trying to figure out what went wrong. She flinches at your approach but doesn't move away. You drape your arm over her shoulder and pull closer. She has a nice smell to her, not quite perfume... probably what she used to bathe with.

This close and you can see down her shirt a little. Her bra underneath is bunched up and you spot a second strap underneath. The reason for her change of garment seems pretty obvious now. She's hiding her tits.

You chuckle to yourself and trace your finger along the side of her chest. It's all but a confirmation. The fabric is under considerable strain.

"Why hide it?" you say.

She glances over at you. "H-hide? I don't know what you're--"

"Come on. It's gotta be uncomfortable." You back away. "How about you let loose a little."

"Not so loud, Jamie, if Coach found out... I'd..."

Nice. You have something to hold over her. Or at least you could... if you felt inclined.