I was a nanny for a year while my son was really young, and he came with me. I didn't start until he was over a year old, and their kids were 6 months and 8 years. It worked great though, they loved to play together, and I made sure the other kids were treated equally. It was the best year I have had- if I made more money, I never would have left. I brought the kids to the zoo, science museum, parks, water parks, all over, having the baby with didn't keep the older ones from still doing things. One of my best friends was also a nanny for over 2 years, and started when her son was 2 months old. She brought him with too. The girls she took care of still did everything, the only issue she had was that the older kids were rough with her baby. The only reason she stopped was because her husband worked opposite hours and wanted more family time. But for both of us, it worked great. It gave the kids other kids to play with. The baby won't be able to play in the begining, but eventually will, and your boys might like having that younger kid to interact with. For my son, the girls I took care of were like sisters. And after taking care of them every day, it was like they were my own and were treated the same. It has been a year now and we still see them all the time, and their youngest (now 2 1/2) asks for my son a lot, and gets excited when we come over. (I still babysit for them sometimes too). I would give it a chance, if it doesn't work out, you can always talk with her about that later. She may even decide if she doesn't need the money that she would like to be a SAHM instead after a while, no one really knows what they will want until they are actually a parent. I always thought daycare was just a normal thing and no big deal- after I had my son, I would do anything to avoid it. I wanted to be with him, and raise him myself, which was my reasoning for becoming a nanny. I would be a SAHM if I had the choice. Unfortunately, as a single mom, I have to make enough money to support my son, and that means he is in daycare again. But if she has been a part of your sons lives for so long, I am sure she is attatched to them enough to treat them equally to her own child. Good luck in whatever choice you make!