When you watch Masters of Sex Season 4 Episode 9, you'll see Bill and Virginia navigate their changing relationship. They end up engaged without a official proposal. Bill is saddened to see Louise has fallen off the wagon. Virginia's father wants to have treatment with Virginia's mother, and she learns about an affair her father had. Nancy ends up pregnant but gets an abortion because she's unsure who the father is. However, Art listens in on Nancy's conversation with Barton, and the baby was Art's. She just didn't want a baby at all. Libby and Keller get caught in traffic and realize it's for Woodstock. Libby ditches him and heads toward the festival.