Let your hands linger.

You slip your hand into her back pocket. You can feel her soft, round ass in the palm of your hand. It makes you harden slightly.

"What are you doing? Get the pin," she urges. You test the waters. You give her bottom a small squeeze. She gasps but doesn't say no. You begin rubbing her butt with both hands now, kneading it. Then you bring your hands up and reach around to begin feeling her breasts. They're soft.

"W-what's going on? What if someone sees?" she asks. You ignore her and put your hand under her shirt, unbuttoning her bra and groping her bare breasts. Her nipples harden under your thumbs and she lets out a small moan. Once sufficiently teased you reach down and unbutton her shorts. You pull down both the shorts themselves and her panties, leaving nothing but a smooth, round ass.

You pull out your cock and slap it against her bare bottom. You line yourself up to stick it in.

"Wait!" she urges, "Put it in my..."