She's actually my half-sister and during the pandemic she stayed with our father, my mother and I because our mother was traveling and she didn't want to stay alone with her step-father. My sister and I weren't very close, we talked and spend some holidays together but this time it was completely different. I guess she missed her boyfriend during the lock downs and she didn't had any problem using me. I loved it. It's a pity that she's already living with our mom again.