I would say no. For that matter, if a family member was in a Catholic Church and, for one reason or another, was not prepared to receive communion (for instance, serious sin without a chance to go to confession), then he should not go to communion either.
Communion is about receiving the Body and the Blood of Jesus Christ, it is not about pleasing your family or making a polite social gesture. That should be the governing consideration.
As for Catholics in Protestant churches, communion there is open to all including small children who see it as snacks(inappropriate in my view)
It is up to the Catholic if he can believe in the same eucharistic transformation in that environment of different believers, without a priest, and coming from a server who doesn't believe as he does. If I was Catholic I would not
meh, what do I know, just a churchless methodist who goes to mass and hasn't taken commnunion in 3 years