My boyfriend and I have been together for over 3 years and we have agreed that we will marry and have our own family. He has two girls 16 and 11. When we argue it seems to be about the kids and my perception of the lack of respect and authority they have for me and/or their dad. More and more the oldest seems to be influencing her dad into things that I have already said no to and to getting her dad out of purchasing certain gifts for me (which are petty but go the fact of her manipulation of him).