I'm behind you, holding your arms against your back, pressing my breasts into your shoulders and leaning around your head to watch the girl in front of you.
"What do you want to touch first?" I ask her. "Make sure you savor her, explore her whole body."
The girl nods, shy but determined. "Her ass, I wanna grab it."
"Then go ahead honey, grab a handful." I push you toward her, making sure there's room between my hips and your ass for her hands.
She takes a deep breath, then steps forward. "You ready?" She asks you.
You nod eagerly, you'd already agreed that she could touch you anywhere she wanted, but it's her first time doing this and she's clearly still getting used to taking the lead.
"Okay," she nods "good girl." Her hands reach tenderly around your hips and settle on your ass. She squeezes it, gently at first, then with some firmness. You let out a whimper full of pleasure and need and her eyes widen at the sight.
"She needs it harder honey, don't hold back." I smile over your shoulder at your new mistress. She nods, more readily than before, and squeezes your ass firmly.
Her hands roam across your ass, grabbing handfuls as they go. Your whimpers grow less needy and more contented as her fingers dig into you.
"It's so nice." Your mistress answers me.
"Tell her how much you like it." I nod at her. "She needs to know how pretty she is."
Your mistress nods at me, then turns to you. "You have such a lovely ass, baby. Thank you for letting me touch it." You smile and buck your hips at the praise. "Good girl." Your mistress pulls your hips to hers and leans in to plant a kiss on your forehead. You blush and giggle as her lips pull away.
"Does she like having her waist touched?" I ask your mistress.
"Um, I, uh, I don't really know." She says, her voice betraying a bit of shame.
"That's okay, we can find out now." I reassure her. "After all, you can touch her wherever you like."
She nods at me again. Then she turns to you and slides her hands over your ass, up past your hips, and onto your waist. You moan a little as her hands come to a rest just below level with your belly button. You watch a measure of confidence enter your mistresses expression. "You like that, baby?"
"Uh-huh." You answer breathily, nodding to her.
"Good girl." She squeezes your waist and you nearly double over, gasping with pleasure.
"Looks like you found her weakness." I muse.
"Looks like it." Your mistress lets the pressure on you ease, a smile crosses her face. "This is pretty fun." She squeezes twice as hard as before. Your back arches, you give a high, breathy yelp. Your mistress brings one of her hands to the back of your head and grabs a handful of your hair. Before your head can clear she's kissing you, her other hand squeezing your side. In your haze you can't help but make a mess, drooling all over and around your mistresses' lips. When she yanks your hair to pull you off of her the grin returns to her face. She looks down into your pleading eyes. "God, baby. It's lovely to see you this pathetic."