Am basing this question on another current thread I can sympathize with but have refrained from adding my 2 cents worth...
Having stewed reflected upon the almost exact same situation in our relationship for the past 5 years (!), it seems to me that my dsd is not so much competing with me for her dad's attention as his partner simply because dh and I have sex and obviously she and her dad don't.
However, Dh has a doting mother who likes me a lot because I take care of her boy (a parting wish I grant her every time we meet, about once a year 
) and her first daughter in law did not. Still hates her with a vengeance...
The way I see it now, dsd at 17 is my MIL! I kid you not, stink eye and all.
I know, I know, I'm sure not all remarried men with dc are mummys boys, but mine is. He feels entitled to be unconditionally loved by as many females as possible (had an affair during first marriage because ex wouldn't sleep with him as often as he felt entitled to 
).
We've had couple counseling for 18 months and never got anywhere. We are at a make or break point atm, of course I'm hoping for making it, but it's up to dh now to man up.
Thoughts please?