I just watched the second episode of Durarara and have a question?

Is that guy just the evil villain and will the 'lesson' he taught (the one that told her to jump) her really going to continue to be applied like that throughout the rest of the series? I want to know ahead of time because I thought it was a HORRIBLE lesson. Especially, for impressionable young children and foolish adults. So, I'd like to know ahead of time in order to just skip it all together if it is. I mean spousal problems affect the entire family, not just the parents, and if there is cheating its because there are problems that should not just "be kept a secret" but addressed, possible through counseling. In addition, it could risk either of the partners or both getting a disease and teaches warped "life lessons" which some teens might actually follow due to low self esteem and the like. :/ So, are there any more things like that in this show?