Right of first refusal

[Jenncat]

Dear Soc,
     I am in Sacramento County.  The children's father and I live literally 1/4 mile apart.  In 2003, he did not show up for mediation.  The order was adopted as is:  Father shall have children Wed., and every other weekend from Friday after school until 8:00pm Sunday evening.  We soon after agreed verbally that it would be best for the children to be w/Dad Wed., Fri. and every other W/E until he drops them off at school Mon. morning.  It has been great for the children, they are thriving and doing very well in school.  In March of this year, Fathers new GF moved into his home.  Since then there have been many times He has left them with a babysitter instead of calling me first.  He also took them out off school one day for 41/2 hrs without informing me to take them to Justice of the Peace when he and GF got married 8/31.  I discussed these issues w/him and he agreed to call me first if he needed a babysitter.  Fri. Sept. 15 was (per court order) my custody time, but per verbal agreement I assumed they were with him.  He had his mother pick them up at school that Friday and babysit them that night as he went out of town.  I was not informed, If I was I would have been more than happy to pick them up as legally it is my Friday anyway.  Our C/O does not state Right of first refusal, but I think Sac County is automatic.   1) Was he in contempt?
                  2) How do I begin to enforce the C/O ?
I am in no way trying to take away the time I verbally agreed to as it has been the best thing for our children, but since March the Father has not been exercising his visitation time by having babysitters instead of him or me.  Thank you for any help or advice you have.

[socrateaser]

...break up the paragraphs.