Mom thinks I have hickeys but I DONT

So yesterday my mom and I were in the airport and she asked me "What happened to your neck?" And I said "What? I don't know" because I didn't see anything there. But later that night ,i noticed them! They look like actual burn marks but for some reason she thinks their hickeys like wtf there not tho. My mom doesn't know I have a boyfriend or anything yet. So she replies with "Mhmmm, you think I'm stupid and shit" my boyfriend has NEVER left a hickey on me and knows not to. And if so somewhere where she can't see it! I tried straightening my hair the other day and I felt the straightening comb touch my next a few times so ITS OBVIOUSLY A BURN. I told her this and she's like "Ok , it's between you and god but you know the truth" and I told her once again "I tried straightening my hair 2 days ago and I literally felt the straightening comb touch my neck a few times" and she responds with "Ok" once again like WTF , she's always assuming stuff and I'm tired of it. Plrase give me some advice! She's so annoying lol 😂