This is not uncommon when taking an extramarital lover.In my experience it is sexually liberating for wives to be with someone who is fully engaged in their sexuality. Not feeling like they are challenging their partner's sensibilities or being shackled to established norms.
Freedom to explore desires without being questioned about the "whys". Expressing cravings without the burden of any long term past, any misinterpretations ("it's what you wanted. right?"), or other concerns that arise at home.
A freedom that is not connected to the last disagreement it who was supposed to take the kids to practice. Organic and awakening, thereinies the appeal. Not justifying anyone's actions, simply imparting my personal insights from my own oast. here.