My step sis Millie was always there for me and I was going through a bad time. I texted her and told her I needed to talk to her. She came into my bed room and I told her I was feeling depressed. I didn't know who else to talk to and I knew my family wasn't going to listen. She expressed how she was older than me and cared about me. Finally, I told her everything I tried to feel better and how nothing helped, even girls. She brought up the idea of how maybe she could help since she cared so much and I trusted her. She suggested we fucked. I hesitated, I was taken by surprise but I always thought she was hot. I gave in, I said fuck it, let's fuck even if it makes things weird.