you couldve when the door was locked; thank God you didnt. i say no, you didnt rape her- when she said "lets go to the others" you said you got some sense back and agreed. everybody gets "horny" every once in a while, but you didnt rape her from what youre telling us.
No hun you didnt rape her, you were both drunk, things happen when your pissed. Dont worry yourself about it
you made her uncomfortable... and never lock a door on a lady unless she wants it. but you too were both drunk and stupid, so all's cool