My anticipation from the concert is that Sophia will finally confront the fact that she is sexually attracted to Sam. I don't expect much action (maybe we'll get a kiss and Sam touching her leg/boob), but I think the big progression in Sophia's corruption will be that for the first time she will fantasize about someone she knows. It will be an outgrowth of her fantasy about Larry earlier in the day, only now it will be someone far more familiar and taboo. I also don't think Sophia will halfheartedly try to resist, I think she'll look at Sam on stage and think "Yeah, I really want to fuck him and I would do it too if I had the chance", none of this "wow, he's cute, but it's wrong that I have these feelings so I'll deny it entirely."