Paying for adult children and family to visit

This is what your husband wants to do... Which means this is a discussion between you and him if your finances are joint.

Maybe look through your finances together, figure out the balance of spending... Is it fair? If say, you spent 3,000 a year on things you enjoy and he spent 3,000 a year including flying his family over... Then that would be fair...

Maybe the best way forward would be that you pay the bills and then you divide what is left of both your incomes/pensions equally.. that way you both choose how to spend your share

I actually had that “serious talk” and now their May vacation has been cancelled. Things are now tense with my husband and I. And yes they have a dual income and can afford it. Problem is his daughter is very self entitled and not shy about asking for money and things. I’m not sure though if it was worth making an issue of since it’s caused tensions within the family. I’m hoping down the road the tension will subside and he will understand my frustration.

Buy them a couple of suitcases and pay for them to go in the hold.
That will pay for itself over time (if not on just one trip).

If they don't bring any clothes what happens to the ones purchased with you?
🤔

We pay for our daughters' air fare, food, accommodations - if with us. Our choice. Make the decision your and DH choice.

Are they in dire financial straits, Lucy? If so I would ask them to at least make some effort to contribute, and given that they are getting a completely free holiday, why can they not pay for their luggage? They don't live free of any costs at home, so some contribution could be made. If they are not in dire straits then I am amazed that you continue to do this. A serious talk is long overdue.