AITA for not allowing my DIL to join a camping trip and doubling down on it

Edit I think some people are confused. We kayak to the first campsite, sleep, kayak to the next sleep and kayak to the final spot and head home .

I am an outdoors person, and before the weather gets too cold I do a camping trip. We kayak down the the river make camp on the bank. It is a lot of fun and is a two night trip.

I have done this with all of my kids and have started to invite their spouses, some show up and some don’t. (Not everyone likes camping). The river we kayak on can get a fast and choppy in places. I have a strict no kids under 10 rules and that they have to good swimmers.

This bring me to my sons wife (Jane- fake name) Jane can not swim at all. She never learned as a child and she still hasn’t learned as an adult. The most I have ever seen her do is go into the shallow end in a pool.

My son wanted to invite Jane and I told him no, that this is safety concern becuase she can not swim. Jane was very upset about it and told me it would be fine. I told her no again and if she learns how to swim she can come next year

Jane is upset and my son is also upset. He has told me he can’t go if she isn’t invite and I stuck to my decision. He is also no happy with me either