H is leaving for two weeks to meet the OW. No body knows where he is. He even didn't tell us when to leave in advance. In such case, I know I couldn't stop him anyway, but any suggestions/inputs about how to deal such irresponsible behaviors? Especially, how to tell him that He needs to be responsible to his kids if he still wants them.

thanks in advance.

M 18 yrs
5 & 7 yrs old kids
H DB in 4/2013
H moved out in 11/2013