Is it normal to have a dream like this

Last night I had the strangest dream. I had a dream that my mom took me and all my brothers to the beach, but my dad didn't go. Also in this dream we had like a certain amount of times we could see my dad because we were gonna be gone so long. So I went to visit my dad and I opened the door and he was making out with another woman. I started to freak out and cry, I don't know why. So I went to my room and the woman had a child who was living in my room, though I became best friends with him.

Does this dream mean anything. I need help because now when I look at my dad i think of how he cheated.