<human>: I've(M21) been dating my gf(F19) for a few months now. We're both very agnostic. Her parents go to church, sometimes, but aren't very religious.

However, her grandparents are a very different story. They're devout Baptists. I'd go so far as to consider them southern Baptists. I was raised Baptist and really don't appreciate the shame involved with a lot of improper practitioners of this sect. 

Now, let me preface this with a statement: I want life to be easier for both of us, but especially my gf. I have no intentions of letting my beliefs run free in front of them. 

Having said this, I made a pact with myself, around December, to be more honest about myself to everyone I meet. I felt that Christianity made me a less honest person and a person who felt ashamed for things like participating in sex. 

While neither of us are ashamed of the beautiful things that we do together, it really pains me when people talk about sex outside of marriage as an immorality. I feel like commenting, in a polite way, that I don't feel the same way. Sex is beautiful. It's a part of society that's been repressed for too long. 

I have been, and plan to continue, coming off as a baptist in front of them when questions arise. When I'm asked what I am, I cleverly say "I was born and raised Baptist". 

So, it begs the question: at what point am I compromising myself too much? Has anyone else lived this and seen the repercussions of pretending? Of not pretending?

Can you condense the text into three sentences or less?
<bot>: My gf and I are agnostic. Most of her family devout (improper) Baptists. Acting as though we follow their beliefs. When is acting too much?