Lost and confused step mom
Hello all first time being on here so here's the question my boyfriend and I have been together for 7yrs we spit up for a bit and he got another girl pg I forgave him and now his son is 4yrs old and I'm totally in love with him we get him on weekends but my boyfriend is not on the birth certificate his son doesn't have his last name either I want his son to have his dads last name but the mom is datin a new guy and so happens the mom and new boyfriend have the same last name she doesn't want to change his last name I thinks its because of the new boyfriend how do we go about changing his last name?