I had a similar situation there was a footnote in the court order that said the date for sale could be varied not sure under what circumstances that would have applied as actually my ex did the wrong thing and sold the house too quick and the consequences of that on the kids hasn't been good. She could not find anywhere to rent and ended up in B&B which is very expensive so a lot of house equity she should have had is now gone. She would have been better off looking for an affordable rental and taking longer on the house sale but my ex says she felt pressure to sell not from me but from the firm who had the charge on the property for her loan for the legal fees for the lawyers - it was a 100K legal bill charged at 18% interest per year until repaid!
I'm just in the process of finalising a letter to send to my ex reminding her of her court ordered obligations but I'm wondering whether I should just apply to the court instead on the appropriate date and request the order to be executed and me to conduct sole sale of the house.
She will be as obstructive as she can be and I just want to draw a line under all of this.