My girlfriend had a sexual dream about her driving instructor?

He's much older than her she's 18 he's 60 something, she has had a crush on him which she told me and the crush was more than once I know gross, we have had a few big arguments over her crush and she still takes lessons with him... assures me she doesn't like him anymore yet she tells me she had a dream about him where she was passionately kissing him, cuddling him and what not, we had been fighting alot recently not over that just in general and nearly broke up, should I be worried about this at all? what does it mean?, i'm over the whole instructor thing now more or less it doesn't really bother me anymore well not enough to kick up a fuss about it like I use to anyway lol, just concerned as to what it means does she not want tobe with me?, does she really like him that much?, I dunno just trying to find an answer that's all oh and she has been taking lessons with him for about a year and a half if that's of any relevance.