T.L.
OK, maybe I'm just old (not really)... but where the heck are you and your hubby going to go from 6pm at night until 10am the next morning???? Especially leaving a 4 month old that long. I'd be fine to watch while a couple did dinner and a movie, but anything beyond that and I would question the parent's social activities. Maybe it's just me.... Please educate me, really.
Edit: Thanks for the message D....I would say leave the child with a family member...not a stranger from Mamasource.