Hi! I'll be glad to help you with this issue.
I can imagine how confusing this situation must be for you. The story of this affair certainly has not progressed in the traditional way. You are not upset. Rather, you've found that your husband's sexuality has improved and thus your own sexual satisfaction. And even more surprising to you, the idea of this other women is sexually a turn on for you.
The idea that you need to feel negatively about this whole thing is not really a requirement. You are all consenting adults. An important element of the story is that this woman, even though she has kids, is not married. Thus, there is no person here who is being deceived. All three of you are adults and you have the right to conduct your sexual affairs as you wish.
Morally, you are not violating our societal laws. You and your husband know your religious and ethical moral beliefs. Therefore, again, you have no need to feel as though there is something intrinsically wrong in what you are proposing.
There is one concern, though. Her expectation may be to continue receiving money. So you and your husband need to make sure that she can fit within your budget. If so, then it would seem you two have found a way to renew your sexual lives. So, enjoy.
Okay, I wish you the very best!
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