My cousin has an animal birthing fetish

My cousin and I were on her YouTube account and she said she had to show me something. It was a video of two enormously pregnant goats just standing there. She said lately she's enjoyed watching videos of animals giving birth with all, especially when baby sharks are cut out. I wouldn't have minded at all and assumed she watched the videos for "Miracel-of-Birth" reasons if it weren't for the fact that she has told me before she has a blood fetish. I could see in her eyes when she watched it that it turned her on really bad but she didn't say anything right then. Later that night she told me that she does indeed masturbate to this, but she told me in a way that made it seem that she was assuming I did too. I told her I most definitely do not and it was just so awkward. She said since I'm a sadist she just automatically assumed I did. WTF...?

Is that a normal thing to do?