Can i sue my exes for child support?

Dear Harold,

I have been in four controversial relationships that ended in either divorce or separation. My life is now complicated as I had children with all the men — three of the men had children in earlier relationships that I took in. I am now left with eight children in the house out of which only four are biologically mine. The fathers of the children who are now married to other women do not assist me in raising the babies and I now intend to sue them. Kindly guide me on how to go about this.