Feast on Marina's black nuts

Licking your lips, you settle in under Marina, looking up at her as you open your mouth and move it in towards her crotch. She hisses when you lightly nip and nibble at her sac. "Oh, you are a filthy boy, aren't you?" she says. You nod and then give her balls a long lick. She throws back her head with pleasure, and you start sucking and washing her heavy nuts, making little hungry sounds and slurping noises, making it clear how much you enjoy her balls in your mouth. Soon enough, you manage to suck one entire testicle into your mouth, gargling and worrying at it.

Marina keeps up a steady stream of encouragement. "You love those big black nuts. Yeah, put 'em in your mouth like that. Gonna get that cum ready."