It's easy to think of what you could have done after the fact. I would have asked the father to take a seat and even pulled a chair up for him and stood there until he sat down. I also would no have asked them any questions about themselves and shortened my spiel about my daycare routines tremendously. I've had interviews with overbearing parents before and try to get them out of here in 1/2 an hour because I know I'm crossing them off my list.

Just send an email back to them to tell them you have had other interviews with families who are interested in your program and have to make a decision so you wish them the best of luck in their search for home daycares, but that you don't think you share enough childrearing philosophies to be a good match.