Your P didn’t have intentions so didn’t understand, but now that he’s reflected, he does understand?? He hopes you’ll buy this load of guff so his feet will soon be back under your table.
He knew what he was doing, but continues the clueless act. He’s not coming clean with the truth. For months he’s had an agenda to build an illicit connection with this girl. You saw the energy between them and his actions toward her. He was confident that you wouldn’t be astute enough to figure it out, and was outraged when you did. He’s now in damage control mode because you haven’t done the pick-me dance like he expected, and he’s tired of caravan life.
@Cuppacakey, I reread your description of his previous infidelity when baby DD was 2 months old. He and that OW met up in her home, and he lied about where he was going. She said, “I’ve missed you sexy.” I’m wondering if that betrayal was swept, like he intends this one to be. If not, what recovery requirements did he agree to that he has now trampled? A promise of fidelity, transparency, and open access to passwords and devices?
I’d say he’s blown his second chance.
I agree with other posters that P has continued to secretly see and interact with the teenager since the party. After all, they’ve clearly been up to something for a good while, and he flaunted her after you rumbled him. Perhaps their liaison has now ended, or maybe they are lying low. One thing is certain — he is ‘that guy’ who chases teens and women, and even feels entitled to cat around when his Partner is pregnant/has just given birth.
Not only is he an untrustworthy, manipulative P, but he’s also a very poor role model for daughters and sons.