Christy, a newly sober single mother, is trying to get her life together, but is challenged when her estranged mother, Bonnie, comes back into the picture on the series premiere.
Christy is determined to take things slow in her relationship with Adam. Meanwhile, Bonnie and her rival from AA, Marjorie, disagree on what taking it slow means.
Christy squares off against Luke's conservative parents who are upset about Violet's pregnancy. Meanwhile, Bonnie is determined not to let menopause get the best of her.
Christy is nervous about going on a romantic weekend getaway with Adam. Meanwhile, Gabriel's wife, Claudia, suspects he is cheating and seeks comfort from Christy.
When Bonnie loses her job and struggles to keep her life together, Christy tries to get her back on track. Octavia Spencer returns as Christy's new friend, Regina.
When Christy and Bonnie find out that Marjorie has cancer, they attempt to make their best to support her, while they try to apply her strength and patience their own lives.