mine invited his girlfriend of a month to our sons first birthday party that i planned and bought everything for & i couldn’t make it until an hour after it started because i was in the ER. i had never met her & asked him not to bring her around the kids until 6 months in. so i had to meet her in front of a whole party of people and fake a smile because he told me if i said anything id ruin our sons birthday and it would be on my conscious and to get over it because it was inevitable 👍