My in laws are lovely, they really are completely normal and understanding about everything other than when it comes to their dog. The dog IMO is a bloody nightmare, it's uncontrollable and wild- I don't like it! They don't even try to discipline the dog they encourage the jumping and laugh.
The dog tried to bite a child's face at the pub when she was tied to the bench we were all sat on, it was awful- the look of horror on the little girls face still haunts me and it was way too close. If she wasn't restricted by the lead she would have bit her and hard. Plus she's a big do so would have done some serious damage.
But oh no that was a one off and MIL has taken her to a private dog specialist she paid a fortune to see who after taking tons of money then declared their dog 'safe' around children. 
Fast forward to now, we have a 10 month old and I refuse to let her anywhere near the dog, this is an issue that is mentioned weekly and the conversations are getting more heated now as we keep saying no, we are seeing them tomorrow at a dog friendly place full of children and I can guarantee they will turn up with the dog.
AIBU to go back to the car and go home if they are there with the dog. tomorrow? The dog is not safe on a lead for anyone there. MIL thinks we are way over the top! Help, please!