Imagine your sister or her friend didnt say anything in fact if her friend didnt then would your sister ? I was your sister and I was scared to say anything in case no one believed me as my brother in law was so loved by the whole family.....

Spose he went on to 'groom' her ? I think he was stopped just in time and its a red flag to you and your family to steer clear.

As for changing ? He just came on to two 14 year olds ! Thats disgusting and no room for change in my book.