Is it normal to take a gay test with my sister?

I'm feeling very confused about my sexuality. I'm not sure if I'm straight or gay, and I have felt this way for a while, but I finally opened up to my older sister about it. She's the only one I've told so far. She told me to take a "gay test" which is to be with a "prime example of a woman" for about a month or two. I told her that I cant get a girlfriend because I'm anti-social and that she was the only "prime example of a woman" that i knew (she's incredibly buxom, curvy and womanly). So she suggested that she could pretend to be my girlfriend. I agreed thinking that we would just go out on mock dates and she'd help me on what to do. But she told me that the "gay test" was me having sex with her. She gave me a handjob, then a blowjob, then we slept naked together. Well, she probably slept, I couldnt sleep at all. I was so shocked with this, my own sister doing those things to me. In the morning she gave me a boobjob to take care of my morning wood, which I'll admit felt amazing because her breasts are a whopping G size cup (which I just learned after looking at her bra when she had taken it off). But I'm even more confused than I was before I told her I was unsure of my sexuality. I really wanna know if I'm straight or not. Is what she's doing to help me normal? Should I give this a few more weeks? Please help me.