That'll leave a bruise across her shoulders, and it'll probably show up later through the cutout of her dress, but it's well earned and something she'll be secretly content with the way she got it.

Some other time she can hold herself off, enjoy the ride to the end as much as she actually loves the end, but not now. She's too far gone with the buzz from being so brazen about this, knowing it's just a matter of time before somebody finds a reason to come back here and comes up on them, and it doesn't take much more of him thrusting before she clenches around him, fingers twisting the back of his shirt around themselves, and groaning from deep inside herself.