My partner's friend gets intimate with me while she's on the phone, and she enjoys it

My girlfriend's friend is a stunning beauty, and she's got a killer body to match. She's got a big, juicy ass that's just begging for attention, and I'm more than happy to give it some. As my girl is on the phone, I decide to take advantage of the situation and start getting intimate with her friend. She's initially surprised, but soon enough, she's getting into it, shaking her big ass for me. I can't resist the urge to touch her, and I start to caress her fat, luscious butt. She's young, only 18, and she's bisexual, which makes this whole situation even more exciting. I'm enjoying every moment of it, and so is she. This Latina beauty is definitely someone I'd love to spend more time with.