My dad obviously married a woman who I'd my step mom. Before they got married my step mom had two other children with a man named Geoff. After they split up Geoff had another daughter (Annabel) with a different woman called Lily. Two years ago at my step sisters wedding I started talking to Annabel who is the same age as me. We got on well and then decided to start dating. We dated for about a year before we called it off because my dad though it was wrong.