Is it a sin for Catholic Christians to go to a Born Again church?

Ask your relatives what suits them? Maybe go to both if you're worried, then you seem polite to your relatives and.get obligation. I doubt it would jepordise you and the catholic church if youre away and miss mass a few time-you'd still be at a service worshipping GOd, so surely god will approve? Idk, ask your relatives what's best for them firstly and then.decide...compromise! The fact youre so concerned shows you're clearly very devout, so no worries there! :)