Hey Pilot, sounds like a health boundary to me. I guess the only consideration is the nature of the bills you are paying and whether not paying could have any possible consequence to the kiddos if she failed to pay? (sorry - not fully up to speed with this aspect of your sitch)
H 37 Me 36 Together 15 years Married 5 years No kids BD Apr 2014 H moved out 2 Jun 2014