My wife did same thing to a degree.......She stopped telling me when she met with some men, she didnt hide new situations but she was seeing 3 regularly and I didnt get updates like in the first 6 months when she was happy to tell me everything.

I thought it was decreasing the amount of sex she was getting but yrs later I found out it was increasing. We stopped due to a family tragedy then she gained weight and just never started again. We definitely never had sex and I wasnt privvy to her masturbation habits ever except in the early days. But unlike you, we didnt have sex much and she started hotwifing because she needed a lot but she didnt want to hurt me.

She stopped the hotwifing and cuckolding talk at end too but from what I can surmise, although she needed the sex it made her feel slutty and she was wrestling with being a good mom and the sex. The life event helped stop us