D.B.
I was just about to ask you to put in a lot more detail about what the problems are that you are facing - the particulars of the relationship, the ages of kids, etc.
Then I read below to see that Margie answered what must have been a very involved question (with extremely helpful details) and then I read Heidi's response, indicating that you had changed it to this very vague question that now stands.
I don't see how I can be helpful without knowing the situation. I'm a stepmother and know a bit about blending families. But I'm confused about why you would take out all the essential information. So I'm not going to answer for now.
If you want to put info back into your question, I'll check back in a while and see if there's anything I can comment on. If you do that, by the way, you will have to go back and check all our answers for added info. You won't get an alert from Mamapedia that an answer has been changed, and the website won't let a person answer a 2nd time in a fresh answer.
Otherwise, I doubt you're going to get anything at all of value here, not with a vague question like that. Sorry. We are a helpful group but you have to want the help.