I honestly don't think anything happened between Kelvin and his best friend's sister. She never once admit that something had happen, she just cries. Also, everytime when someone asks her what happened, she either says "don't ask, it's ok" or she says it vaguely: "we already you know." "You know" can be anything, kiss, sleeping without sex?
Yeah .. you can still have sex when you aredrunk as long as one partner is not so drunk .. the not so drunk one takes charge .. that's all .. lol You can't have sex only if both people are completely dead drunk ... that's the case where you can't move .. just sit or lie there and sleep .. lol