Greetings Gamer Girl,
Welcome to our forum.
It's great to hear that things have turned out alright for all persons involved. Perhaps your husband is "wired monogamous" but "poly friendly." In other words, it might not be necessary for him to seek out another partner ... who knows.
Hopefully things will continue to go well. Keep us posted, and let us know if you have any questions, etc.
Love means never having to say, "Put down that meat cleaver!"