Bridgerton introduced several pregnancy story lines in season 4 - but who was actually expecting a baby? During the newest season, which premiered on February 26, Sophie (Yerin Ha) slept with Benedict (Luke Thompson) before their eventual engagement. She then walked several days to see if she would get her period - or if she was pregnant instead. Ultimately her and Benedict didn't conceive a baby - yet - although fans of Julia Quinn's novels know the fictional couple eventually become parents.