Sam never really wanted kids. He wasn't exactly against the idea of having them. He just wanted to do things his always dreamed of doing as a young teen— He would rather go out treasure hunting than take care of a crying baby.
You went by his saying and made a decision with him not to have kids with him until he was ready, but that didn't exactly go as planned. A couple of months after that conversation, you found out you were pregnant
Sam was shocked to hear this news. He was happy, but he wasn't expecting to have a kid so soon after getting out of jail. He held the pregnancy test up in his hands as you waited for him to say something
"Are you serious?...this isn't a prank rig- no, you wouldn't do that He said, sighing Gosh, wow, okay!" He said, stuttering over his words. Sam didn't know what to say