Make or actually pretend to make reservations at a nice place near a sports bar. Just make sure the place you make reservations is closed on Sunday night but you got your dates "mixed up" somehow. Act pissed. Suggest plan B as the sports bar. Make sure you have your gym duffel bag in the car with your Wentz jersey as it would probably be too obvious if it was already under your shirt and tie.
Be prepared to schedule a future date at the nice restaurant but check Eagles/Bison calendar first with the sitter and make it clear when to be busy in the future. Give the sitter $20 bucks to make sure she/he is busy or checks with you first about sitting during football season. Also, buy your wife a smaller purse for Christmas. Good luck!