My girlfriend had a dream she cheated on me with her ex?

Long story short.

We're very honest with eacother in our relationship. I've had dreams of me cheating on her with women from our school. One time was sex the rest was kissing although I never would in real life.

She's said she's had dreams of her cheating on me too with well, at first it was random guys. But one of them she had a dream it was her ex who she dated I think last year for 5 months on and off.

In her dream she was with me and her ex texted her come over so she lied to me and said her sister said she had to go home and i offered to walk her but she said no and left and went to her ex's house and as soon as she walked in there was candles and they had sex.

The only reason this is still bothering me is cuhz of what she use to tell me ( we agreed not to talk about her ex's anymore now though but not back then) She's repeatedly said I was in looooove with him. And other bullshit like that cuhz she asked me if ive ever been in love.

She said she has absolutely no feelings for him and she dislikes him. She says she doesn't even think of him like that. the only time she does is if he's doing good and stopped doing drugs because it tears his mom apart and his mom has texted her before about him still doing drugs. She does not communicate with this asshole. The reason I call him that is cuhz he called her cussing her out like yesterday after he found out she was dating me to which she said "You're just mad because I found a new man who I'm in love with" and hung up.

I get it, it's a dream, but alotta ppl say you dream what you were last thinking of, even though she says she doesn't could she be lying? I keep trying to forget it but it bugs the **** outta me. Please help.