Drunk and horny 14 year sister

You've came home from university for 4 days after being away for 4 months and your parents have given your room to your little sister and turned her old room into a home office so you are forced to sleep on a air mattress in your little sisters room but first you have dinner with your parents and sister and everyone is drinking wine and getting drunk including your sister, you and your sister head to the bedroom to sleep but you start taking and your sister brings up how horny she is and that no boys her age have big enough dicks for her and admits she wants an older guy to fuck her and then she asks you to fuck her since she's horny and you're older and currently have the opportunity