Husband needs to cut the umbilical cord.

My husband and I were talking about if his parents asked him to come out to their place and fix something of theirs for them rather than go to a fertility doctor appointment with me. So he would basically rather go help his parents than go to a appointment. His rational is we could always reschedule another appointment. I feel kind of pissed off a little bit. It takes us a good 3 months to get an appointment. I'm just wondering what everyone else's opinions are about this.

His mother and father are fully capable of doing household task themselves but for some reason like to rope him into doing stuff.