Exposes her nipples

Gina spins again, and wriggles her shoulders slightly and, just like that, her breasts are exposed. They’re a lovely size, pert and demanding to be sucked, slightly puffy areolae with stiff little nipples. She slips the other shoulder down, and now she's stripped to the waist. The dance has gone from sweet to slutty in less than a minute. Her hands wander, cupping her breasts, but it's when she pinches both nipples, hard, and pulls at them, that I realise what's happening; I'm watching my girlfriend masturbating on film - and I'm watching with her Mom and Dad!