Anna has a successful career in real estate and is happily married to Liam Harrison. When his expected promotion comes through, they’re going to start a family. At least, that’s the plan. Things aren’t going quite so well for little sister, Rachel. Married to Gary, she’s a dejected and lonely stay-at-home mum expecting her second child. Everyone is delighted with the news - except Rachel. The truth is, she’s horrified at the thought. Vivacious Jill, the girls’ cousin and best-friend, knows exactly what makes them both tick but helping them to understand each other – well, that’s another story entirely. All three of the Gallagher girls have rough times ahead. The question is: when the going gets tough, will blood really prove thicker than water?