That poor girl Mollie. So affected by her fractured family setup (mother with stepdad and 2 'new' DCs + 2 DCs from stepdad's previous relationship/father with new woman and 2 new DCs then herself and her 2 siblings).
She was saying that she does not know where she fits in. That setup would complicate me as an adult let alone a teenager in the middle of it.
FFS I wish people would think before ending/replacing relationships and perhaps put their DCs first instead of themselves!