Ex spouse needlessly using the court system & costing me a LOT of money.

My ex of 5 years & I have joint decision making & shared 50-50 residential for our 7 yr old.

When I don't agree to 100% of ex's wishes in decision making she takes it to her attorney & if I don't cave it proceeds to mediation

My original suggestions that include a compromise & best interest of the child are always the final decision.

The attorney & mediatior are also perplexed but I cannot request my attorney/mediation fees be paid since mediation is not a ruling.

Question: Is there any way I can legally require her to pay some of my fees (either past or when she does it the next time)?

The most recent one cost me $2,200 & a day of work.

I also pay child support monthly.