need some advice

i am about to move out to be a live in a nanny to a single dad, i will be bringing my daughter with me and her father will be picking her up on the weekends (we are separating might end in divorce). now i am nervous that she will take to the man i am moving in with as her father..and i dont want that..he wont be home during the days though more at night. and i don't want her to get confused or anything. i guess i just don't know what to do. i have never been single like this with another man around my daughter. she is 14 months by the way. but any suggestions would be greatly appreciated.

I'm sure if the other man doesn't act like her father she won't get confused

If the relationship is kept professionally, there will not be any confusion. You're really brave to be doing that! I'd be too scared!