How do i make my mum happy?

my mum's first husband became a drug addict and she had to sell the furniture to feed her 2 kids, then she ran away and met my dad, funloving biker dude, but he chucked mums first 2 kids into the street coz mum had me and my sister, he became a coke addict and started seriously hurting my mum and her other kids, then we ran away but he stalked us, and mum met adrian, who's married and mum had a miscarriage and he buggered off but now he's moving in and mum loves him but she doesn't like him, he's so boring! i think she's in it for the money coz she's skint, he's not that bad though, should i stop him moving in coz she is traumatised and doesn't know what she's doing or shall i say something?