Thanks for the quick replies.
PEG - Natalie goes to sleep around 10-11pm but sleeps until 7-8am so I couldn't go after she is asleep.

CSM101 - I agree that I certainly seem to be worring about this more than I think I need to, but I thought it worth getting the views from you guys.

Mexo - This is as I thought. I am doing dead lifts, shoulder and squats with a bar in my Tuesday night routine but still not enough to really kill me for the whole week.

Right, I think you have convinced me enough to not worry about adding some dumbell exercises around my two nights at the gym. Thanks!