If the reunion is taking place in my home/lawn, I'd board the unpredictable dog for the assured safety of my invited guest.

If the reunion is not being held on my property but someone invited to the event is trying to sponge a freebie in my home? I'd board the freeloader at the nearest hotel.

MIL could hunt me down and whine all she wants. Wouldn't faze me. No is no.

i may or may not respond as you did, but boarding your dog or not is not the issue i see here. it's the blatant disrespect towards you. you made your decision, your MIL didnt like your answer. too effing bad, it's your house, not hers. she has absolutely NO right to pester you about it. like twoview said above, "no is no".

MIL can f*ck off. your house, your rules. bravo for blocking her.

This is a little off topic and really has nothing to do with whatever you decide....

You are expecting your MIL to behave like a mature adult and respect your choice to not board the dog. (which I agree with, but that is neither here nor there) Yet YOU are responding like a child and avoiding her phone calls and blocking her.

Why not also be a mature adult, and politely but firmly tell her NO, and that NO means NO, and that you don't appreciate being hounded to change your mind.

There's no reason to avoid the conversation, other than to be immature and not be willing to have a small confrontation. You are being reasonable. You are willing to host adult guests. You can not accommodate children. End of story.

But stop holding her to a standard of mature behavior you don't hold yourself to.

All I can say is "Your house, your rules"

My SIL has 3 dogs. 1 has issues with those in the house that doesn't live IN the house.
If any company comes over,they have to place him in the kennel in the back yard.

And his behavior is quite scary.
I refuse to go over there or allow my DD over there.

There are friends who refuse to bring their kids over because of the dog-that's their choice.

Just like MIL is offering you kennels for your dog, I'[m sure you can just as easily look some hotels for the family.

I'd offer to board my MIL in a kennel instead. I like my dog, I don't like my MIL.

"No thank you" is my response to most stupid requests.

I don't think it's childish to ignore her phone calls. She's been given an answer. She just doesn't like it. If she's acting like an annoying telemarketer than she doesn't deserve any better treatment than you'd give a persistent telephone salesperson. Not answering is better than "click".

Out of curiosity, who asked you about boarding your dogs? Was it the family who was invited to visit or your MIL? Was the family with young kids invited to stay with you originally or get added later? I am just trying to get some of the background.

From the perspective of the family with young kids going to visit relatives:

I would rather get a hotel room or stay home than risk my toddler with a dog that isn't used to children. We went to visit DH's grandparents and were invited to stay with them at DH's aunt's home by DH's aunt. We had a 1.5yo, 7yo, and 9yo at the time. What his aunt didn't tell us is that her dogs had never been around young kids. And her poodles went after our kids every time they went past because they ran, skipped or jumped. One of the dogs seemed to take an instant dislike to our toddler for no apparent reason and did bite DH when trying to get at BS. DH's grandpa kept sending the dogs out of the rooms or outside, but DH and I just tried to remind our kids to go slowly and ignore the dogs. Both dogs were ok with the older two as long as they went slowly (acted more like adults). By the end of the visit both dogs were playing fetch with SD, though the one still went after BS. We carried our 1.5yo or placed ourselves between him and the dogs. It took away quite a bit from the visit since we had to be so hyper vigilant beyond normal parenting. Despite that we never asked Aunt to change the dogs routine or put them up. As we were the guests, we changed our behaviors. If we'd known about her dogs in advance, we would have said thanks for the invite, but we will stay in a hotel.

I would not have asked her to board her dogs just so we could stay with them. DH and I both feel that guests do not have the right to request changes to the host's home unless the host offers the change.

I see it as asking a family member to be boarded. This is my fur babies' home...

That said, I have 2 dogs that are friendly but not exposed to little people often. When my family with a little person visits, my dogs are either outside or in my room if the little one is out and about the house.

Is there any possibility of something like that? I ask since your DH isn't in agreement and it is his home too.

I will never understand the thought process behind people/family, who want to travel and then STAY with family or friends. Find a freaking hotel. My whole family and in inlaws are like this. They just LOVE to stay with us. Not me…I want my own private hotel to relax in and have privacy in. Drives me nuts. I always let people stay with us, (even though I don’t like it) but they get mad when we won’t stay with them. Lol.

Now…on to your issue. You already have a crazy dog, so boarding it will not be a good thing IMHO. Call your MIL and tell her that you are sorry but the dog can NOT be boarded. The people who board dogs would not be able to handle him and he would get kicked out anyway for being aggressive. Sorry but maybe they can stay at with her.

This does sound like no one handled this situation very well.

A little off topic.
Our counsellor has a wolf, full wolf not a hybrid. Their last was 50/50 wolf/shepard.

She said no one ever asks to stay with them, LOL