So
1. Your wife didn't breakdown in front of you, but she did, or will, in fact breakdown. At the very least she would be devastated to hear that. You should understand that.
2.First you said there were things you loved, then you said you loved HER. That's not the same, and you know it. And you knew thay before you said it. And you knew that as the words were coming out of your mouth. So if yoy have never before tols your wife that you loves the OW,then this is new information and therefore a blow to your already suffering wife.
It's not about being grateful for honesty. Like the other poster said, it's interesting that you chosw this area to be honest in, begs the question whether you've been so perfectly honest about everything that you think gratitude is the appropriate response here.
If your wife cheated on you, told you she loves sleeping with you the most, but the OM is bigger or really good in bed, you wouldn't be grateful. Apply that empathy to your wife.
4. Don't tell your wife you love her more than anything in the in the same conversation that you are telling her you love your OW for manipulating you and deliberately hurting your wife.
That's what your OW did. That's what you love. A cheating woman who wanted, and I mean wanted, to hurt your wife.
You love the woman who hurt your wife. But yet, you love your wife more than anything in the world... there's nothing to love there. You need to be focused on that and realising how wrong that is instead of being grateful that your wijjie is showing you grace you likely would never extend to her.
Also, this isn't a vent (side note the fact that you'd call it thatsays a lot about your level of remorse/empathy in addition to your reaction to what you already said to your wife which will in fact hurt her forever)), but
You don't love your wife more than anything in this world.
You voluntarily hurt her, enjoyed it. And now you're talking about how much you love the woman you hurt her with.
You seem to think of how the OW treated you, which was only to get what she wanted from you- attention etc. Orthe ego boost that comes with being valued by a married man, getting him to chose you over his wife, jeopardize his marriage for her, hurt his wife,
But you don't mention what your wife is doing for you.
Interesting.