In Dutch there's an medieval expression that goes something like: When it's ripe quickly, it will rot quickly.
When I started reading this thread I kind of knew how it was going to end. The couple immediately promised recordings and a gig, and that sais a lot about them, maybe the're impulsive, under a lot of pressure, pains in asses to work with so they don't get musicians easily, etc, etc. They should have asked to come and play once, try it out, see if works out on personal level, etc. And then, maybe, go further.
Gerald and Geckobeats are right: relation is 90% of the thing. It's strange to commit to people and promise things so fast. Be weary when that happens.
Why not take your time looking for a nice band that suits you and build up somthing steady?