DNA Test !! I haven’t cheated !!

Ok what you do if your partner of 2 years , who you share a home with told you they didn’t want to sign birth certificate until DNA test result came back. At first I was fine because a pass girl friend had tricked him into thinking her child was his and he was devastated to find out it was his . But what have I done for him to questions me ?? I’m going to be so embarrass on the best day of my life , because he doesn’t want to claim my baby until test come back .