I need to rant.

So the guy I've been seeing (for two weeks now) and I had a really nice date yesterday. We went to go get sushi and then we were going to go down to the beach to walk down and just hang out at the pier. But, he and I both forgot to get towels so we figured, well his house is on the way to the beach so we stopped by his parents place to get towels. Well while we were there, we kind of got swept up in kissing and we didn't go any farther than that but he did get to my neck and accidentally left visible hickies (which I scolded him for after bc I knew that if someone saw them, I'd get shit for them). Once I got home, after at least an hour of trying to make them less visible, my mom asked me to drive her to go pick my aunt up from and then get dinner. It wasn't until we were getting dinner that my mom noticed that I had a hickey. She acted fine about it and joked about it with my aunt. But, when my sister got home and my other aunt came over, my mom jokingly said it to my sister and then my sister stormed off and is now super pissed off at me because she thinks that they are disgusting a trashy. I don't necessarily love them or anything but I can't remove them once he made them. Now she won't even look at me nor talk to me and she's being a hypocrite bc she slept with her now girlfriend on the third date and drove 100 miles to see her for a weekend and suddenly I don't tell her about a couple hickies and she can be mad at me?! She didn't even tell me she had sex with girlfriend on purpose, it slipped up in conversation somehow one day and I of course "can't judge her" and it's "her life and her body". What kind of double standard bullshit is that?!