Dad's Daughters Want To Exclude His New Wife From Weddings

This dad's daughters decided they didn't want his "new wife" to attend their weddings. It sounds like there is a bit of a hang up going on, when it comes to the daughters moving on, and accepting their dad's new partner. Ultimately, the choice is up to them, but at this point, it looks like they're in a bit of a gridlock. So, dad is wondering whether he's in the wrong over potentially choosing not to attend, if they won't include his new wife?