I thought that the hangover was stupid... and hilarious! I laughed the whole time.
I agree that letting what happened earlier go is the right thing. Can you change it? No, that ship has sailed. Theres no sense in beating yourself up over it. Everyone backslides, says things that they arent proud of, whatever, we all screw up, its a learing experience, is it not? I agree that the on call time will be a nice break for both of you, and I would be really surprised if she didnt spend at least a little time researching the Retro weekend on her own.
Stay dark as much as possible, and allow yourself to enjoy a little bit of your life that hasnt been polluted by your WAW.
I guess I gave the wrong finger to the wrong man...