<human>: Can you give me a shortened version of the text?

Me (M22) Her (F24). Been together for 4 years. So her family is very right wing and pentecostal. In their beliefs you can't be with someone who is not of that faith or you will go to hell. She doesn't have an issue with my lack of "faith", but her parents and family assume that I am of the same faith. The issue is I am atheist. Should I let them think I am christian? which may cause issues down the road for example if we get married I don't want it to be a religious wedding. I will not baptise my kids and so on. or should I tell them I am atheist? which I am pretty sure would be a huge issue for their family. Again my gf knows all this I just don't want to have a shitty relationship with her family who she is very close to.
<bot>: Gf of 4 years family is very religious and assume I am as well. Should I tell them I am atheist or just let them be blissfully ignorant?