Rush to put it back

You jump up and run to your sister's room as quickly but quietly as possible. When you get to her door, it's mostly closed, so you push it open. Inside, you see a girl pulling her last piece of clothing -- her panties -- off and throwing them to the floor. She must be Amy, you think to yourself. You suddenly realize that you're as naked as Amy is, and with your sister's dildo still in hand. You're about to turn and bolt back to your room, when Amy turns around.

She sees you and you both freeze for what seems like forever. "Are you here to join us?" she asks. Not knowing what else to do, you simply nod your head. "The more the merrier!" Amy smiles. "Someone else is here to join us!" Amy calls out to your sister, "And she has your toy!" Your heart sinks. How are you going to get out of this?

Your sister comes up behind you, and you turn around and back into her room. Your sister simply says, "You look awfully familiar. What's your name?"

"Umm, Lauren," you reply, choosing a name at random.

"I'm Gwen. Now how did a sexy thing like you get into my house?" she says, walking closer to you until she backs you into her bed. She takes her dildo from you as you fall to a sitting position on her bed.

"I- I'm your brother's girlfriend?"