My husband traveled with our children for spring break and needed covid tests to board flights&for avoiding quarantine. Is this medical expense?

During pandemic travel was not recommended unless emergency. My ex traveled with the children constantly to vacation in Europe, Florida, and in the Caribbean. Now he requests payment from me for the covid tests due to his travels. I believe this is not medical expense as the kids were not sick, were not socializing and there was no other reason for them to take the test other than to be allowed on the flight or when returning to New Jersey to avoid an extra week of quarantine. I have no say in his travels and am very low income and I find it absurd that I need to pay for his vacation expenses. I am very low income, he is rich. I do not have a say when and where he travels within the US and to Europe.