To me this is the ultimate betrayal and I could never raise an OC so I sincerely suggest you file for D, but of course it's your life and your choice and therefore if you insist on giving R a shot, which by the way will likely be a daunting endeavor that will certainly take years and with no guarantees, I suggest you make a very informed decision and follow through with the polygraph, but first and like others mentioned, insist on a complete written timeline of the A, do not mention how polygraphs work and how many questions there will be on it, and finally have her read the timeline out load to you (typicallly helps with remorse). After the written timeline make a list of the questions you need answers to, based on your situation I'll suggest a few just off the top of my head and in no particular other, others may give you more:
1)Did you know the OC was not mine ?.
2) When did you start your A (not just the PA part)?
3) Are you still in contact with POSOM and if not when did you stop ?
4) Does he know or suspect he's the biological father of OC ?
5) Did you love him and if so do you still have feelings for him ?
6) Were there any other "pregnancy scares" ?
7) Did you ever consider leaving me for him ?
8) How many people knew about the A and their names ?
9) How often did you have sex with POSOM ?
10) Have you ever terminated a pregnancy and if so when/how many times ?
11) Have you had any other As or inappropriate relationships besides this one during our time together ?
12) Are you willing to sign a postnuptial agreement in my favor in case I find out you're still lying and/or I eventually decide this is a dealbreaker for me ?
13) Are you still lying or omitting information about this and/or other inappropriate relationships ?
14) Did you ever bring POSOM or any other AP to our house ?
15) Since we're together have you sexted and/or sent naked pics or videos to POSOM or any other person besides me ?
16) Did you and POSOM ever try to get your stories straight before and/or after Dday ?.
Keep posting frequently, the collective wisdom of SI could help you go through this difficult situation, as you have already confirmed, cheaters lie a lot and TT, every case is different byt cheaters typically follow a similar script, we've literally "seen" it play out THOUSANDS of times here on SI and other forums.
[This message edited by Buster123 at 5:54 AM, Wednesday, April 6th]