Obsessed with husbands ex

I seriously have some OCD and can’t get over my husbands ex! I stalk her social media on a fake account, and google all the time!

This woman is literally the devil. She ruined my husbands life for 3 years. She took his vehicles. Took his money. And more!! I literally despise this woman more than life!!

I don’t really know why I do it though. Seriously my husband and I are happily married going on 5 years. She hasn’t called in 2 years. But I seriously can’t stop myself!!

I feel like a terrible person because all I want for her is for her to be absolutely miserable! But of course that never seems to happen!

Wtf is wrong with me!? Why do I have this obsession? What can I do about it?