I'm sure your girls will be totally fine, but I daresay it's a good idea to keep you're friend out of coughing range of your DP till you know if he's got it, or not. Good excuse for you to go out for a coffee or lunch with her while DP spends some quality time with your girls
Haha not a chance DD2 wont stay with anyone else and it's ok i will be seeing her while he's at work... if only though