Not so much for me, but Mum's parents seperated when she was 3. Her Dad went off and had a new family, and saw very little of my Mum and Uncle, but Nan remarried when Mum was 11 (I think). She loves her Step-Dad and considers him to be her Dad (often when speaking to people she will call him Dad rather than Step-Dad). Pop (Mum's Step-Dad) had a Son from a previous marriage and Mum considers him to be her Brother and I've never heard her refer to him as her Step-Brother. We have family gatherings all the time (christmas, easter, birthdays, etc) so we're all quite close as a family.