would you care if your SO talked to his ex regular basis??

michelle
okay my so was in with his ex for a few years.she had 4 kids.they are his godsons.she left him because she only felt friendship for him. he was totally in love with her.they have been broke up 1 year now.he says he talks to her because her sons. I'm pregnant by him now.I don't agree with this.advice?