I have grown up with my step sisters since I was 6. One of them I get along with and the other one has never really made an effort with me. I wouldn't say we are close but we talk friendly enough to each other when we see each other. I've never met either the boyfriend or fiancé. Since being 18+ I see my step sisters every 3-6 months and that's only when I go to see my dad and step mum.