Should I feel guilty for dreaming about this?

Last night I had a dream that my mom was marrying a *woman* who she doesn't like. I didn't think anything of it when I was asleep but then when I woke up I was like, "What kind of sick person am I to dream that?" My mom is married, btw. I wasn't thinking about this before I went to sleep. Am I a sick person for dreaming this; I feel really dirty.