I can't believe my daughter said that!

My daughter(12yr) and I went to see OTP again tonight. We were watching the oculamancy(sp?) scene , the part where Snape showed up in the mirror of erised with Harry parents. I heard her laughing, and she said "I guess Harry likes the bad guys too" and just grinned at me. Then she said that " I always knew that their was something between those two" and laughed some more.

 Makes me wonder if liking slash is inherited? You might think she's too imature to know what she was infering, but my child is quite bright and very mature for her age.  I'd bet money she  meant what she said.  I don't know if I should be freaked out about this or not.