H rescues maids in danger from employers

I have been reading through the group and you all are great. I hope you can help. I am looking for a book I read a while ago. The heroine ran a small group who helped maids and female servants who are about to be compromised and and finds them safe employment. It was recency or Georgian time period. H find a out and gets some of his alpha male friends to help her when white slavers run against her for girls. She had 2 aunts. Any ideas? It was part of a series of, maybe 4 males, at least two of them married in earlier books.

Thanks in advance!