Court order to keep 'the other woman away' from my baby girl?

Anyone know is it possibe to keep my husband's tart away from my baby? I have accepted that my baby needs contact with her father which I do not have a problem with but the thought of her playing happy families with my little girl makes me sick especially as I discovered they were having an affair 6 weeks before I gave birth!! I am in the process of divorce and my little one is only 6 months old....only serious answers please as I need help with this one!