I see. It is comforting that she did not need sentimental involvement with others, it means you have a stable marriage both of wanting to keep...
Sexual confidence is important to her, obviously she is wrong not considering herself attractive...
On the other hand hotwire means married woman being free for sex with other and with her husband's consent... She is a free wife having the support of her husband to test more than one man in bed.
Based on our experience it is very important for both of you if you could join her during her experiments. This way she would feel your support and you would be closer. But this is a topic to be decided by the couple not by readers 🙂