Liz Lemon meets her mother's old flame, while Jack Donaghy's mother, Colleen, gets tangled in his relationships with Avery Jessup and high school love, Nancy Donovan. Jenna's mother, Verna returns, while Tracy learns a lesson from his "mom".
Sincerely — The McGuire Sisters
When was Liz's mother was with her ex-boyfriend when she was young; Tracy looks at Jenna hugging Verna.