Thank you folks for your input. I believe I will keep my distance. It's actually not her husband at all, he's a pretty laid back and cool guy, very understanding. He wouldn't have a problem with her talking to her childhood best friend. Honestly it's mostly because she gets on my nerves. She's got that bubble gum stupid teenager attitude, which was cute when she was 16 but now it's just irritating.
Really I could see myself being friends with her husband, but I think that would just hurt her feelings...