I think she is trying to find herself - the thing is why do they go backwards. She is talking & acting like a child. I wouldn't really mind is she was trying to grow up but she seems to be regressing in her age.
A married woman with 2 kids going out to nightclubs every week with the husband at home ???
I went to a counsellor the other day and she stated that you enter a relationship / marriage with the same level of emotional maturity but people progress at different rates. Her first question was was she having an affair, on drugs or alcohol. I answered that I thought not and i really don't think she is interested in any of those things.
As for counselling we are going - I think she realises that things are terrible and we need help.