What should I do? My Step Sister wants to have sex with me!?!?

Remember that she is only related by marriage. Each of these happened in the summertime.

Here is the story:

We were eleven at the time everyone had gone to the woods and I was finishing the dishes. She was in her room. I walked into the bathroom and she came in after me (I didn’t see her) Then I turned around and saw her she inquired me to make out with her. Well after an short argument, I did. She tried to take my pants down but I refused (I didn’t know what sex was) But that was it for a year.

Then we turned 12. We went camping and I had to get a drink and she followed me, and we ended up making out again.

At thirteen we were swimming (now she was really good looking, and I knew about sex.) But I was swimming and I wasn’t watching were I was going and accidently grabbed her breast. I got all blushed and went underwater for a while. She pulled me up and said it was ok. To make a reaaallly long story short I saw her breasts and She saw my penis. And she had addmitted she wanted to have sex with me for a long time. My dad pulled in the drive and I got away but I’m not sure what to do. I’m 14 now and I don’t know what’s going to happen this summer.

I have decided that I have to discuss with her and tell her that we can’t have sex until at least we are 18. In stead if she still is persistent we can do something else other than sex, like oral.

Just recently we were watching a show on Tv then I got called downstairs. I got up to go but she got up to and she pushed me back on the bed and this repeated a few times until she looked down at me and said, “ (giggle) , your blushing, (more giggling)”, and then she let me go.

At another incedent my brother (one year younger than me) somehow caught on to this and he tried to help me. He convinced my sister to get into bed and hide. And my brother came and got me, and told me to go to the room. I did and I saw her under the covers. I started getting fummed at him, we argued. At one of the comments we said (I don’t remember exactly what it was) she said, “Well first you have to satisfy my needs…” and my jaw dropped to the ground. I thought to myself Holy Crap!!

I mean I am pretty well developed, 6, and 1/2” with a ruler, and keep getting erections at the wrong times, and for no reason either.

And to make matters worse I continue to have erotic dreams about her.

Well I know she wants me to be with her and I do to but here are my questions.

1. How do I tell her I feel the same as she does for me?

2. When is a good time to bring that up?

3. When will this feeling of lust and want end?

4. What would you do?

5. Any other advice?

~ Thanks