I am looking for advice on a situation within my family. In brief, my sister has got together with a new man - been together for a couple of years' now. This man is a creep. He has a habit of brushing (just short of groping!) boobs when he gets the opportunity, and generally is far too tactile, in all the wrong places, again when he gets the opportunity. For example, letting his hand brush over your bum when kissing hello.
He does this in plain sight of other people but it is cleverly subtle, and so far no member of my family has had the balls (probably wrong choice of language!) to confront him directly about it, although most female members (apart from my Mum - surprise!) have experienced it first hand. We have though mentioned this several times to my sister who gets very angry and upset and denies all knowledge, suggesting that he is just 'friendly.'
Anyway, we could probably just about live with having a creep in the family, but the trouble is she has a young teenage daughter. On several occasions we have had to endure watching him touch her in what we consider an inappropriate fashion - playing with her hair, holding her hand, stroking her face, etc. We possibly might think this was OK, if it was not for the context. As it is, it is almost unbearable to watch. We are really worried about it. Not necessarily that he might take it further, but really that no potential stepfather should be touching his teenage stepdaughter in this way - or to be honest, at all.
Are we over-reacting ie being unreasonable? What would you do? There is no way my sister will leave this man.