Dear Niccola....this is everybody's dilemma. Some people know automatically what they want to do....or they think so....and then it happens. Some know they will go right for divorce and some will try to reconcile and rebuild. NEITHER IS RIGHT OR WRONG. It's what you really want to do in your heart and are able to do and you have to be honest with yourself. Often times it is not possible to recover from infidelity to really have a "marriage" again....it's just roommates with or without benefits. Other people recover somewhat but they never view their spouse or their marriage the same way again - I'm in that boat. All the romance, romantic feeling....gone. Never returned. No sexual interest on my part again. I'm fond of him, I love him as a person, I'm grateful for his presence but it's not a romance. That's okay with me. I'm old and have health problems anyway so no one's gonna pick up my glass slipper. This is okay for me. It might be okay for a lot of people (I think it is) but everyone has to make that decision from their heart, themselves. Some folks are able to make a new marriage but it really IS a new marriage - not just a continuation of the old one. And triggers never go away 100% although they do diminish, sometimes greatly, over the years.
I think what might help you is greater clarity about how you feel and think and what your values are and what you want out of this - or any relationship. That might be through counseling and I would advise talking to a lawyer. Not only to see what divorce would look like for you in all its ramifications, but if you do decide to stay married, what kinds of effective legal boundaries you might put on a future divorce if you want one, for example if she cheated again. Knowledge is power.
Speaking of power, who has the POWER in your relationship? Is it equal or does your spouse hold all the cards? Can you be the prize that must be won again, or are you afraid to assert yourself that she would leave and take your child? I think it's perfectly okay to want to stay for your children, I don't demean that at all and there are things that are inevitably lost in divorce. I would also not want someone else raising or influencing my kids especially an AP (I don't have any kids actually). I support your feelings in this and to me, staying for the kids IS a valid reason for staying together. So is money, health, property - whatever is valid and important to you. BUT....I think you have to have some kind of limits, boundaries, lines you won't go past or your spouse is just gonna still think of you as a doormat even if they don't act on it. You have to feel that your spouse truly wants YOU and that they RESPECT YOU. I think respect is essential - I demand it in my relationship and I'm very clear about that with my spouse. We treat those we respect even better than those we just have affection or even desire for. Respect is about how we project ourselves and also about what others see in us, especially what they admire and look up to. You might think about the topic of respect in yourself and your relationship, particularly in counseling. We try to live up to those we respect as they inherently seem to demand more and better of us.
This is gonna take a lot of thought, reflection, discussion on your part and you have to figure yourself out first, what you really want, before you can present a really coherent picture to your spouse. What do you NEED from marriage? What are essentials you can't do without? What lines can't be crossed? Once you know what you absolutely need and demand, you can figure out what you might be able to compromise on because....I think that's what reconciliation basically is. Compromising with a less than perfect or desirable situation so you can achieve what matters most to you. It's not possible for a lot of people - some would not want to have sex with an unfaithful spouse again. Some could not tolerate them traveling or going out with friends.
In many respects it IS easier to divorce and I generally think it's the best option, but you have things you really value that matter to you, namely your kid, and that could be a reason for staying if you are able to construct an acceptable relationship with your spouse at least as long as your child is a minor. You just need to work this through in your own head, and also see what your spouse is willing to do - is she really remorseful about this? Has she done any work to repent - yes, REPENT - of doing this to you? Is she trying to make you feel loved, safe, respected? Has she changed her ways, like a job, or going out, or using drugs - some kind of tangible change? If not, if you do decide to stay for any reason....you need to have these things or it will just be too painful to stay and your child WILL SEE THIS. My parents had a terrible marriage and when I was small....I used to urge my mother to leave my father and take up with this other fellow I liked much better. I was probably 7,8, something like that - kids know more than we think. She didn't, unfortunately.
Please keep coming back here, the people are great and very supportive, and you will be heard. They have many great ideas and insights based on real experience and I think it will help. We don't all agree but we all want to help if we can.
Good luck!!! I think with counseling - someone who has done infidelity or trauma counseling - you will gain greater clarity about what you want and what you must do without. It's the indecision, being stuck in limbo, that to me, is the greatest pain.