This reminds me of a situation years ago with some friends (who are now ex-friends). They had two young children at the time. They believed that vacations were supposed to be for adults only, not children. So they planned elaborate trips to Europe just for the two of them. And expected their family and friends to take care of the kids while they were away. So grandfather took the kids for a couple of days, one friend took them for a weekend, another friend took them for a few days. I was appalled. When we were growing up, sometimes my parents would go away for a weekend on their own, but real vacations included all of us. And we never had much money so the trips were to visit relatives, or to go camping someplace close to a historic site. Anyway. What really got me about these (ex-)friends was when the wife looked me in the eye and asked me, "what days will you be taking our children while we're on vacation?" Not "can you please help out" but "when will you take them." So I said "none." I'm sure the look on my face said much more than that.

(This actually was not the reason they became ex-friends. But that's a story for another day.)