Of course she is.

Your girlfriend, dancing with a bunch of her hot friends, looks curiously at you showing up at her house party with two young blonde schoolgirls hanging off your arms. Suddenly, you feel soft arms wrap tightly around you, as Jenna's little sister hugs you from behind and squeals your name. Jessie has long dark hair like her sister, and is wearing a tight, short, blue tank dress.

"Oh my god!" the cute teen squeals at the two schoolgirls you brought with you, "Hey Abby! Hey Ashley! You're here with my sister's boyfriend? That's so hot!"

"Hey Jessie," the twins smile at her, "We didn't know this stud was your sister's boyfriend. But he's hot, so we came with him." The three girls giggle together.

"So, Jenna," you say to your girlfriend, your arms still around the twins' waists, "great party."