Plz Don't divorce me he said?

my husband ask me not to divorce his azz...Now just a little breif summary ..we had been seperated some time now ..he has a mistress whom just gave birth to his son of which this is her 4 child by her 4th baby farther and she's only 28..not to mention we were pregnant togeher aou babies are 5 months apart..now that he still lives with her and I tried over and over again to try to keep my family together..I have 2 teenage daughters whom he raised for the past 10 yrs. by a previous relationship..So i got my divorce papers and have been doing what I have to do to file them..Now that he see i dont need him I pay my own bills got a job and in the process of enrolling in school..Why is he soo concerned now about this divorce now? why would he say dont divorce him if he is not comming home for? what kind of game he thinks my life is? I wanted to give my baby a fair chance with having her farther in the house hold but he rather be there with the mistress and her 4 chidren..but he allways telling me how crazy it is over there im tired of his Dum azz..I'm still filing for the divorce so he can stay exactly were he at! Why would he say don't divorce him if he still there with her and besides I dont want no baby momma drama causse she a vindictive little {bleep}|