In laws pushing us to get married because we're pregnant

• Pregnant ♡
Hey everyone, so when we told my in laws we are pregnant they started pushing us to go get married. Marriage is in our plans but not right now just because we're pregnant. They're saying that the baby won't have my so's last name which I want them to have their last name. But I doubt you have to be married just for the baby to have his/her dad's last name. They're saying he won't be on the birth certificate or that they won't determine the baby as his. Etc etc. Which honestly I doubt any of that will go that way. We don't want to get married just because we're pregnant, yeah later on we will because it is in our plans to get married even before we started ttc & got pregnant. What do you ladies think?