Ok...I'm going to have to speak out to my shame, but for your salvation.
I have experienced terror that you cannot imagine which is the direct result of having been encountering, and seeing, the spiritual reality of adultery and this drove me to a total conviction of the truth that is in the Bible.
I destroyed a marriage through adultery many years ago and continued the relationship. There is no way to describe the guilt, the grief, nor the consequences which are both worldly, and unfortunately open the door to things that cannot be understood.
My wife has never been able to deal with betrayal and has never softened, and our son has been the innocent victim and she disappeared with from 6y ago so I do not even know how he is, other than growing up without a father and with a deeply wounded woman.
4y ago, I married a young woman and shortly after we married, the most terrifying things manifest that leave me in no doubt as to spiritual realities and everything that is warned of in the Bible. I will leave out the details to keep to the point and that is;
The intended design of creation was one man and one woman for life within a marriage. That marriage is joined by God and violating that through adultery has worldly consequences that are horrific. and eternal consequences that are terrifying.
Anything that is leading you into sin against God - which this situation most certainly is, is straight from hell. Following through with this situation will destroy a marriage, a family, and it is extremely likely that you will find out the truth about this woman once that is accomplished.
The devil is real and beyond our comprehension, but please, I urge you with everything, walk away from this now, and if you can find it in yourself now, turn to Christ.