Maternal Instincts

I just got to utter the words to my son, "This is why mommy is going to hell."  Is this a bad thing?

My partner is taking great joy in scaring the crap out of our over-tired son after watching a show he found a bit too intense.  Among other things, she is telling him to get ready for bed, but "don't let the hooded men get you!"  

I'm sure I'm not encouraging her in any way...