I got married to my wife (BM)with SD15, SD5 and SD4. I had to deal with the first SD15-18 and her bs of being rude, mean, ignoring and manipulating...BM did nothing to squelch her behavior. Thank goodness she went off to college. Now I have been dealing with the younger two playing mom against me and BM lets them. I end up always being the villian, defending myself. Most recently a little thing(aren't they always!) of just asking SD12 (was SD5) to pass me the remote for the tv. She ignored me at first, like she never heard me.