Lisa is pregnant, and following her journey to the birth, we see 18 years into the future as her son prepares to leave for university. Dave tries to connect with his son.

Lisa tries to find a way of getting Stephen to talk to her. Amanda splits up with Dave before beginning the move to her new life.

At a friend's wedding, Lisa struggles in the face of Amanda's pregnancy, and Stephen tries to find the courage to confront Dave.

Flashbacks show Stephen and Lisa's first meeting, while Amanda's pregnancy and Dave's ambitions create uncertainty for all.

Lisa manages to get pregnant again, trying to stay positive in the face of her fears. Dave overhears Amanda talking about her ex and wants to know more.

Lisa and Stephen try to get pregnant again. A tense dinner with Dave and Amanda exposes hidden tensions.