OK...been separated for 7 years, had a new relationship for the last 18 months, my kids are 18 and 21, they are happy and like my partner. HOWEVER.....my ex has two children 12 and 20 and his ex wife has decided that she doesn't want me to be involved with them at all. We are conforming because anything other than that would be a nightmare for his kids because she's being so difficult. Do I just suck this up?