mid-wife crisis
When a married woman with kids hits 40, decides its a good time in her life to attempt re-living her 20s, bails on her marriage of multiple years and proceeds to dive off the deep end of craziness, partying, and dating any guy who will pay attention to her.
Dude, don't talk to that chick. She's gone insane, and she's knee-deep in a mid-wife crisis!