I absolutely do not think this would would be the case in most MN replies.
Just from a petty cohort.
The holiday cannot be claimed for.
Why wouldn't you want your partner to go and bring someone?
The sex of the person makes absolutely no difference.
The only CF is the person expecting someone to compensate them for something they cannot claim.
So tacky.
In the OP's place, if she paid for her half, she could ask him to repay her in full for the holiday as HE has backed out.
What petty lives people lead to not want something that they can't use, to be used by others.
Last year my niece contacted me on a Thursday to tell me that she couldn't make a fantastic concert in my city, fantastic seats etc.
None of her friends, family, or circle could use them.
She offered them to me as she couldn't use them.
I could have used them, but wasn't that pushed.
However, one my dear friends is a fan and absolutely jumped at the chance.
I hadn't realised just how big a fan she was.
They had the best night ever as the weather was glorious.
My niece was genuinely thrilled that a big fan had had the benefit of them.
Did she asked to be paid?
Of course she didn't.
She was very disappointed not to go, but said the fact that someone else had gotten such enjoyment from them, had really softened it.
I would 100% feel the same way.
As would the people I surround myself with.