Invite older sister to the party

Deciding I may need someone to back my story if my parents want to know how the party went, I decide to invite my older sister along. My sister, Holly is 20 and home on break from college. She recently broke up with her boyfriend who was a jerk and came home to spend some time with the family for summer break. She's the responsible one or at least that's what out parents think.

So, I knock on her door to see if she would be interested in going to the party with me. "Holly, are you in there. I need to ask you something." She doesn't take long to respond, "Yes, Alex, I'm in here. Come in if you want to talk to me. I'm not going to talk to you through the door."

Holly is sitting on her bed reading a magazine when I open the door and walk in. She looks up at me and just stares waiting for me to say something. "Holly, I'm going to a graduation party and want someone to back my story if mom and dad ask about it. Would you care to come with me?"

She puts her magazine down and looks at me intently. "Sure, Alex, I'll go with you. It sounds like it's going to be lots of fun if you need someone to go along with what you to get mom and dad to believe you. I need to get out of the house any way because I'm so bored, but I'm driving though if you want me to possibly lie for you."

I groin, but agree, "Sure, that sounds fine. Let's take your car." She smiles at me before getting up. " I need to change real quick for the party, cause I'm not going like this with you." She then kicks me out of the room, but doesn't close the door all the way. I start to walk off, but for some reason decide I should shut the door for her. However, when I turn to shut the door, I can see Holly through the crack of the door in her panties and bra about to remove her bra. Before I see anymore, I quickly turn and walk away to wait in the living room.

It isn't much longer when she comes out in short shorts and a tank top. I try not to think about what I saw earlier as she heads towards the front door. She then turns, "Well, are you coming?" I quickly hop up off the sofa and head to the door. We both go outside and get in the her car to leave for the party.