44m 43f married for 18 years with 4 kids. First, I'll admit my wife does not know I'm on here. But I'm looking for wisdom from those who can share it.

My wife and I have a pretty good sex life, but recently some "hot pillow talk" has opened up some ideas we both have about having perhaps additional sex partners. We live a very conservative lifestyle, prominent members of our church and such... She acted out and took a few risks in her college days, and confessed all to me prior to our marriage. I accepted what she told me, basically "forgiving" her for it.
I find myself now trying to reconcile what I have always believed to be true about sex and marriage, with things I now think may not have been entirely true, but was merely what I was told to believe about sex and marriage... I don't know every passage of scripture on sex in the Bible, but recent thoughts have led me to the think that if my wife wants to experiment with another woman, we should be able to make the decision for her to be able to do that... and if she also desires to explore sex with another man... perhaps we can do that too. Anyone willing to chat with me... I appreciate it in advance, and I apologize also in advance for maybe not being able to articulate what is really going through my mind.