I'm posting this on behalf of my best friend, it's a bit out of my frame of reference so I thought I'd turn to mn to advise him!
I'll try to keep it short. He has 2 kids (DD 13, DS 11) from marriage that dissolved a few years ago. He's been seeing his gf for nearly 2 years. The kids have struggled to warm to her but they've made some headway.
His DD is particularly close to his SiL (brother's wife). DD confides in her auntie and he describes them as 'besotted' with each other. She has a lot of influence over DD. SiL has taken against his gf and is now doing her best to meddle and make gf out to be devil incarnate. Now DD doesn't want anything to do with gf and made a big scene at Xmas where she said she no longer wanted to spend any time with gf, and it resulted in gf having to leave.
All the reasons for people not liking gf seem to be quite superficial and he thinks it's just that they think she's not suitable for him.
He is talking about ending the relationship with gf as he doesn't see a way round it - any headway made with kids is destroyed by SiL basically. He confronted SiL and Brother about SiL's stirring and now there is a rift between the 2 brothers and nobody is happy.
Is there any hope?