Have not had sex in a long time..

Hi all, i'm a daddy to a almost 06 month old baby. Me & my wife have not had sex since we found out she was pregnant in June 2019. So it's almost 15 months we last had sex. When baby was in the tummy, I just didn't like the idea although everybody says it's ok. Now that baby is out, both our focus is all to baby. I'm not complaining, just wondering if it's normal that there are couples out there not having sex for their baby? Btw, I still love them both tremendously. Advises please.