Backstory :- Dn is one of 6. My sister was in a bad relationship last year which produced the 6th child. The relationship had a massive impact on all the children. DN is in year 6 and has suffered bullying (now sorted) and had problems with her eating.
My sister has announced to the family she is now pregnant with number 7. Came as a massive shock as we didn't know she had a partner, turns out she had the children lie. The baby bomb shell has upset DN, she feels completely pushed out and scared this relationship will be another repeat of the last one.
I am very close with DN since everything that happened last year she has spent a few days a week with me since, and my sister was ok with this. DN has expressed some concerns and has now asked can she live with me, I've told my sister this and she thinks DN is just being a mard arse and will come round too the idea of a new sibling and a father figure.
Her plan is to just let DN finish her "tantrum" and everything will be fine. I have disagreed with her and suggested maybe she has a heart to heart with DN. DSIS has refused because she believes that's playing into DN hands.
My sister is a lovely person, just at times she makes stupid decisions. She thinks with her heart most of the times instead of her head and I believe at the moment isn't taking DN fears and worry seriously as she is just so focused on her new relationship and baby. She has always wanted that happy ending and she thinks this is it.
Of course I want too see my Dsis happy but at the same time Dn isn't happy and feels ignored.
I honestly don't know what more I can say or what I can do.