Plot summary
Tammy gets a call from her long lost Aunt Cookie ( Kathleen Turner ), who claims she just recently found out Tammy existed since she had cut ties with the family before Tammy was born. The two get along great, but Cookie quickly admits she only went looking for Tammy because she needs a kidney. Tammy decides to go ahead and get tested to find out if she is a match for Cookie. While Tammy is getting tested, Cookie accidentally lets it slip to Bonnie that she's known about Tammy ever since her mother got pregnant with her.
Tammy gets angry and doesn't think she'll ever be able to forgive Cookie for leaving her in the foster-care system. Bonnie assures her that one day she will, the same way Bonnie was able to forgive her mother for dumping her at a fire station. Later, Tammy meets Cookie for lunch and tells her she has no desire for a relationship, but will still donate her kidney if she's a match. Absent: William Fichtner as Adam Title meaning: Wendy's description of the surgery required to remove a donor kidney and Jill discussing what she hopes to be wearing for her own funeral.
Credits
Adapted from Wikipedia contributors, Mom season 7. HTML formatting and reference markers removed.