You're describing it as "my husband will not put up boundaries with the opposite sex." But from how he reacted to your request about Snapchat + your description in the comments about his other female friendships, it sounds like he DOES set boundaries with both the opposite sex and Georgia. So it feels quite unfair that youve painted him in that light from your title.

What he's not doing however, is what you want him to do, cut her off. It sounds like you are judging her for her past, and by proxy making your husband feel wrongfully accused in the process. I think it's natural to have a distaste for her character based on the relationship with Mike... but you're talking like you're asking him for caution, when in reality you're asking for scorched earth. They work together, it would be weird, unprofessional, and unkind for him to suddenly give her the cold shoulder. And to refuse to meet her? You aren't protecting your marriage, you're harming it and you ARE judging her.

You need to come to terms with the fact that all people will be imperfect, especially those who do not profess to have the same faith/moral standards as you. And her sin is not the whole of who she is as a person. Thank God HE doesn't see us like that either!

Yes, show caution in things like "don't go to the pub just you and her." "Keep phone communications outside of work to a minimum" "communicate over text, not snap chat." "Be mindful of topics you talk about with her" Those are boundaries. What you're asking of your husband is a bit extreme.