Tell him you don't feel comfortable with her still working for him since the affair. Never be afraid to discuss your feelings with your husband. You should be able to talk to him about anything. Communication is very important. If he truly loves and respects you he will not continue to employ her.
After 5 years together my boyfriend wanted a break, and we did for 2 months. I didn't think of dating anyone else whoever he had this thing going with a colleague of his. We got back together and a wonderful year followed, only to be dumped again for no clear reason. Then after a week of breaking up he had the audicity to take her to a very public place, and I've been bumping into them ever since - the message is that if there was chemistry it will probably remain there. I'm not married and we don't have children, but 6 years are pretty hard as well, so sweet I'd advise you to slowly start rebuilding your life, and if possible, love him less.
I am sorry to hear this happened to you. My husband is also a jerk.
IMHO I think that if he still employs her it is because they are still seeing each other.
If he really loves you & didn't want to be with her anymore,
he would have no problem with kicking her to the curb.
I hate hearing about husbands doing this.
They should know how it feels to tear a woman apart like that, it is devastating.
To tell you the truth children will not keep the bond of marriage together forever. The trust is gone and he is still keeping her close. If he was sincere he would hire another assistant who is capable of doing the job. The affair is clearly not over so please do not be naive. It is also not a matter of keeping your enemy close because that is a dangerous game to be playing. Ask your husband if he is ready for a divorce because it is clear that the affair is active and the trust has gone. He has come up with too many excuses to keep her around and it makes you very weary. You cannot rebuild a marriage off lies stacked on top of lies. The children will suffer from the felt tension in the home. Adultery is grounds for divorce and disrespect should never be tolerated. You should sit down and have a serious heart to heart and demand that he either fires her or get a divorce. You are stronger and worth more than that.
I think you must be more serious in this situation first be sure from his feelings for you and for her then you must ask him to not employ her any more as aprove for his talk about feelings