Do people really do this?

Attached is a post that I have seen on Facebook. I’m wondering is this something normal for people. This is nasty 🤮!! I know my husband sister stated that she ate her mom juices and I thought they was just nasty. I don’t know if she was playing, so I do not let my kids go over to his mom because I don’t trust them now. Your relatives should be off limits. You shouldn’t even be sexually attracted to them at all. I have heard of people passing women around in the family, as my father in law and his cousins did this also with my husbands mother. Which I also feel is nasty 🤢, mostly of the women though. But this post is most definitely disgusting!!!