[xiaozhi]

Sad to say, ex wife if got money, can always hire lawyer and file you variation of court order and you will need to appear in court or mediation session. I think it might be even possible for your ex wife to ownself file and ownself represent ownself in mediation and court if mediation failed to save on lawyer cost just to make your life miserable and keep attending mediation court session. I know because I been thru and have ask my lawyer before there is no way you can stop your ex wife from filing.