Mom won't stick to the schedule
We've got the custody agreement clear as day. She has kids Wed-Fri, I have them Sat-Sun plus Mon-Tue evenings. Last month she kept them an extra night 3 different times without asking. When I brought it up she said I was being rigid about it. But that schedule is how I plan my work and honestly it's what the court ordered. Do I need to get our mediator involved or am I being too strict?
Before you escalate this, have you two talked in person about why she's not sticking to it? Sometimes there's a reason behind it and working it out directly saves a lot of headache. Not saying you're wrong, just might be worth understanding first.