I dont know if context matters here but this was around the time she and her besties lowkey pushed the narrative that he had something with his teenage co-star (she outright even claimed that it was a 19 year old which she rapidly deleted, and one of her besties liked posts of people claiming this based on the sun speculating), I wonder if her "accusation" is based on that
At 14 their opinion can in theory be taken into account (a judge can still refuse though), Alice already announced that it is her plan to drag the divorce until Ella is 14, and she may succeed tbh.
Ella is in a runaway age, I'm not convinced that she can be forced either way. I think realistically that relationship is gone until she either falls out with her mom or needs something her mother can't provide (money), which tbh might be in the not so distant future. Again, I'm not blaming the kid, but teenagers usually view relationships to their fathers more materialistic and have a much stronger bond to mothers, especially if their parenting is more lax than the father. It's very different for younger kids, they are more playful, and can be more easily swayed: that's why it's strongly recommended to break up before kids reach pre-teen age (if you think the realtionship is not salvagable). The younger one probably still falls under this, but time is running (and perhaps it is already too late), and it's probably extra hard if you have sister and mother influencing you.