I was going to say exactly what Jaye said, she is right. If you are that
uncomfortable watching someone else's kid then DON'T do it. Men don't understand the pressure we put on ourselves to care for someone else's kid and the sacrifices we make to do so. They make everything seem easier said than done, that's just men! haha So he may unfortunatelly never understand where you're coming from but he needs to back off and support your decision. I've been a SAHM since my daughter was born, 8 years ago. There have been sooooo many times when money was tight and I wanted more than anything to care for a few extra kids every week to make some extra income and thought, hey it would be great for the kids too to have play mates over, but the more I thought and thought about it, the more I couldn't go through with it. Some people just don't have it in their blood to care for anyone elses kids then their own, and theres nothing wrong with that! I'm just like what Jaye said, it's hard enough for me to leave my kids with my own mom who I know loves my kids to death and she's the only one I trust with them so I can't imagine ever bringing them to someone who wasn't 100% there for my child. I use to be in the same situation with my OWN sister, she needed childcare for her son who I love of course, but can't handle him whatsoever, he's a very hyper boy, back talks to me, doesn't pick up after himself, etc. and it was very hard to let my sister know I can't keep him but I wasn't happy doing it, the extra money just wasn't worth it anymore and he so my Mom stepped up and took over, Thank the Lord! : )
Just know that I understand exactly where you're coming from, you're not alone in your feelings nor does it make you a bad person. Nothing's more important than taking care of your own kids first. I can't imagine it being too difficult for them to find a good MDO program, daycare, etc. if they're willing to pay you then they obviously can afford to pay someone else. I say for the sake of the child, do what you feel is best, he deserves to taken care of by someone who can fully commit and "want" to take care of him every day they have him. Maybe you could be an "occasional" fill in but let them know you can't be the full time care taker. Good luck to you, hope everything works out for everyone!