Do I have a right to not communicate with my in-laws?

20 years ago I moved here from another country. I have a happy family - my husband and 2 kids. The rest of my family is overseas. My in-laws attended our wedding and chose to keep a very big distance. They lived only 100km from us, but NEVER came for a visit even when the grandkids were born. For a good 5-7 years we couldn't afford a second car so I couldn't drive to them. And my hubby works out of town and has his car with him.
There was NEVER any help whatsoever. Not financial, not physical, not even a phone call. My kids don't know their grandparents. Last year they suddenly invited us for Christmas. We went… And regretted it very quickly. There were a few neighbours there as well to whom they paid a lot more attention than to their son. They were so boasting about giving neighbours kids iPhones for Christmas and their own grandchildren got a pat on a head. Each…
Last week we got the news that the in-laws split up and the mother wants to come to stay with us for a few weeks while her new house is getting built.
I say not a chance!
Do you feel I have a right to do so?

You do.

You can choose to be mean in the face of meanness, or choose to extend grace.

Up to you.

I feel you have EVERY right
They haven't been very good grandparents to your children
As your family are overseas, your children have missed out on that

Do you think perhaps this could be the catalyst to have an involved grandparent?
A chance for them to bond and have that relationship?

Golden rule of a happy marriage; never do anything that you are not both 100% enthusiastic about. The two of you need to keep coming up with ideas till you find a solution that works for both. Your husband needs to be the one to communicate with MIL, he must tell her that you are thinking of ideas but have not come up with anything yet.

Until then, your mother in law can stay where she is. Until the divorce is final both parties are entitled to live in the marital residence.

Well, you need to talk this over with your husband. He may view this as a chance to establish a better relationship with his mother, and he has the right to try. Make it clear that if it doesn't work, you will reserve the right to ask her to leave, but I think you both should give this a go.

These people haven't done anything worse than more or less ignore you, which frankly, a lot of daughters-in-law would LOVE. I know of far, far worse in-law situations.

Give it this one attempt (with the clear caveat to your husband that he'd better pitch in with household chores while she's there and do everything he can to entertain her; you're not going to put your life on hold to cater to her) and see what happens.

No you don't and it would be wrong to your spouse to do that.

I think youre right, i wouldnt let them stay with me either if they treated me like that