In a nut shell:
I'm separated from H but he has the DC every other weekend. The wedding between his DB and SIL falls on his contact weekend.
I am not invited (not bothered about this) and H has informed me that his DB has asked him to be usher at the wedding.
Our DC are 5 and 3 and I'm concerned that if they go to the wedding then there will be nobody to supervise them. H is a big drinker when socialising and I've no doubt that he will get arseholed at his brother's wedding.
I'm thinking about asking him if I can take the DC away that weekend to just avoid the whole issue but wanted to check if IWBU to suggest this. The other issue is that I have another child who will not be invited which I think is unfair for various reasons.
I have to go away for work the following weekend so I could do a 'swap' to make it fair.