I think I'm late to the party and mostly everyone else is done with this topic. I'm not expecting much interaction, so maybe these thoughts are just for me.
Darkness Falls,
Of course your opinion is valid and valued. Probably 75%+ of opinions here are that infidelity pre-divorce is more harmful to the family and children then divorce without infidelity. Your marriage and infidelity situation are unique, and I'd like to hear you elaborate.
I'm trying to understand your assertion that "the practical logistical ramifications to my children would be no less" if you left for an OM vs divorcing your husband prior.
I get the impression that you are not emotionally satisfied in your marriage, and that you feel your husband is not either. (I'm basing this on other posts where you said you wish you hadn't married him and that your husband told you he wished he never met you.) It also sounds like you don't envision your marriage relationship ever improving. Therefore, you see your marriage as largely a business partnership to raise children. That's why you feel there would be no additional emotional pain/trauma for either of you as a result of infidelity vs divorce? It might be good to ask your husband to make sure he feels that way.
I'm sorry for you, your husband, and your children. It sounds like you are all in a difficult situation, and I hope you find a solution. You both are comparatively young and have many years left to live.
I'm trying to frame this by putting the emotional impact to a BS aside, because the initial assumption is about only viewing how it affects family and children aside from BS.
As a parent I think my spouse is an important part of my child's life and it's part of my parenting job to help keep myself and my spouse around and healthy to care for our child and not be a burden to them. The STD risk naturally comes up. I guess a parent could mitigate (but not eliminate) that with HPV vaccine, other protection, and not having sex with your spouse while in an affair. Is it a risk worth taking, and is it fair to expose the other parent to it?
There are also many stories here of affair partners/OBS doing things that hurt or damage families in myriad profound ways during and well after affairs. That's another risk to your family/children.
Personally, I think the two reasons above alone make affairs an act of bad parenting. I think the terms “bad mother” or “bad father” add a black/white dimension and an unnecessary layer of shame. Mothers seem particularly sensitive to it. Most of us have an act of bad parenting now and then. This is a serious act to me, and there are more reasons why.
hikingout, wrote
There have been children of affairs come here and express the pain of their parents affairs and all the ways it effected them. So, I do think depending on what happens, how it's handled, what they witness, where they are at that juncture in time...it can be very traumatizing. It can effect how they view their mom or dad, and can effect their self worth.
Unfortunately, those things above are not things a wayward can control when they have an affair.
A parent modeling the behavior of deceit, betrayal, selfishness, and a lack of integrity and empathy is not good parenting. I don't think the child's age matters. I think it would be emotionally difficult if a teen/young adult child finds out years later that a parent had been engaged in infidelity while they were forming their first adult relationships and listening to their parent's relationship advice or using that marriage as a model. There's no real immunity to that. There are plenty of stories of AP or OBS or evidence coming out years later. My own WH still has a hard time facing and comprehending his own parents' infidelity revealed in his late 30s, although they are not divorced.
Also, I've seen infidelity have long term effects on other relationships between other siblings and extended family members too. So yeah, I don't think there's many cases where the children are unaffected. At the very least, it's taking a big parenting risk for a selfish gain.
That's all an opinion – my opinion. I hope I don't sound hysterical. I don't feel hysterical. For what it's worth, I think my WH is a better father overall now then he was before the affair. I'm ok with what my son has learned from this situation. I don't like it that he's had to live through this, but I prefer that it's out there with honesty.