Sex File: Help! I'm stressed about holiday sex

My wife and I are about to go on a much-needed holiday for a week. We're in our 40s, but have been busy with work and kids lately

Q: My wife and I are about to go on a much-needed holiday for a week. We're in our 40s, but have been busy with work and kids lately, so sex has fallen by the wayside. 

I think she is hoping this holiday will change things, but I'm already worried about the pressure to perform. What can I do to feel more relaxed about it all?