AITA for blocking this person?

So I got a message request from "Sylvia". She was a lesbian, I was a lesbian/bi, I found that pretty cool. I was looking for more lesbian friends or maybe even a girlfriend one day.

Anyway, Sylvia and I got to talking, and she asked me what I looked like. I sent her a photo of myself and she sent a photo of herself to verify that she wasn't a man, she said.

After a while, she said she was looking for a girlfriend and I said it would be nice to have one. Maybe we could date if she wanted to but only if we got to know each other well enough. She said yeah because I'm cute, it would be great.

Sylvia then told me she was hypersexual. I'm asexual, but I didn't mind this. It wasn't until she started being really freaky towards me...

She told me that if I didn't like sex, she would "make me like sex" and all that stuff, saying she was imagining me naked, and talking about us having sex and stuff. "I can make you just like me and like sex", she said.

Afterwards, I got a bad vibe from her, but I kept going, because she said she would respect my boundaries and that she was joking.

Later, she asked me what colour my bra was. I felt pressured and she kept telling me, "send me the bra, the colour".

I felt very uncomfortable and was messaging my friend Lynn about it. She told me that Sylvia was very creepy and that if I was uncomfortable, I have the right to block her. So I did, but I do feel a bit guilty about it because it made me uncomfortable, but she was just a horny lady.