I will give as brief a summary of the situation as I can, as it is complex to say the least.  

DH and I have been together almost 7 years.  DH was with BM for 25 years starting in high school.  Children of their marriage are (to me) SD25, SS21 and SD15.  All SKIDS live out of state with BM, who was an adulteress and is currently remarried.  Both BM and her husband are alcoholics and narcissists (by all accounts).  DH also has ExGF that has glommed onto BM and the kids.  

Struggling in my two year long distance relationship with my fiancé. I live in NYC and he's in Canada, and he has three kids from his previous marriage. First off, his ex is a nightmare. Contacts him daily and always seeking attention from him. Everytime I come to Canada she gets so possessive and finds way to contstantly interrupt us and still treats him like her husband.

my husband asked me today " so how are we going to get past this?" after saying to him i hate when the boys ( 9 & 11) are here and that he needs to understand my life completly changes when they are here. They literally drive me nuts and there is no. where to go to get away from them and covid is not helping .