We got dogs and found out niece is allergic and cannot spend the summer our house with her cousins

So since my husband and I don’t work in the summer, aside from the occasional meeting, we run a sort of unofficial daycare with our niece and nephews. It works out great because our kids get to stay social in the summer and spend time with their cousins and nobody has to pay for childcare in the summer (aside money for food/excursions). We have a bunch of stuff to keep the kids occupied and they all seem to have a great time. According to them our house is the fun house.

Anyway my husband and I recently adopted a mama dog with multiple pups. We had promised our kids a dog for a long time and she sort of fell into our hands so we felt like it was destined to be. They are not weaned yet, but all are very healthy. There are 5 of them. My husband plan on keeping the mama dog and at least one of her puppies. That leaves 4 of the puppies. Since my husband has 1 sister and I have 3 siblings its the perfect amount for each family to get a puppy if they want one. If not we plan on keeping any remaining puppies. Our siblings and kids are all big dog lovers. So I sent a text to our group family text to tell them about the dogs and offer each family a puppy once they are old enough to leave their mom. I also said that we could watch the puppies during the day as well.

My husbands sister wanted a puppy. My sister and one of my brothers were also enthusiastic about getting a puppy. My Brother, Kyle, was however not. Which was okay because we can keep the mom dog and two puppies no problem.

Later on though Kyle texted me privately about how we should have asked about getting the dogs before because his new stepdaughter (he just got remarried) is extremely allergic to dogs. Like she has trouble breathing if she’s around a dog. We never knew or were told about it. We were supposed to watch her and my brothers son during the summer along with the rest of the cousins. With the dogs being here she cannot come over. Supposedly she was really excited about coming over here during the summer because my nephew told her about our house being the fun house. So Kyle is mad because we are now excluding her. As well as his son as he cannot risk him coming back home with dog hair on him. We also basically made our brother and sisters houses off limits since they will also have a dog now.

Yesterday Kyle texted he is upset because now he has to find last minute childcare for all summer long for both kids. School ends in less than two weeks and according to him he is unable to find any affordable summer camps with spots still open as registration was in April. The only one nearby with spots is the extremely expensive one. So he and his wife are now expecting we either get rid of all the dogs and find them homes unrelated to anyone in the family. Or we have to pay for both of his kids to go to the expensive summer camp, which costs $450 a week. It’s a lot because this camp is in the next town over from the one we live in and charges non residents more.

Also I heard through my sister that this has caused internal strife through Kyles family as his son is now upset and blaming his stepsister for both not getting a new puppy and not being able to come over to our house this summer.

My family does not want to give up our dogs. Me, my husband, and our kids have become very attached. I also don’t feel like its right to take away a promise I made to give each of my siblings a puppy. They know about the situation with Kyles stepdaughters allergies however they still want the puppies. They already told their kids and they are similarly excited having already picked out names and bought dog stuff. Spending that much money on childcare for my brothers kids is just way out of our budget though.

I’ve thought about trying to find someone to look after the dogs for awhile so Kyle and his wife have more time to figure out childcare. However I have not found anyone willing to unless we surrender ownership of the dogs. I talked to a friend about it and she sort of agreed with him since we caused this mess. She said we would be playing favorites with my siblings and my nieces and nephews if we were not willing to get rid of the dogs or pay for camp that we should just not watch all the kids to be fair to everyone. The problem is I know that would put my other brother and sister in a very bad spot as they couldn’t afford to pay for summer camp either. They’re younger than me and Kyle and less established in their careers.
I don’t know what we should do here. My husband is unbothered and just says we won't watch Kyle kids and thats the end of it as far as he is concerned.