Here’s a yikes.com interview with Amy Hargreaves. Notably:
What can you tell us about Sunday night’s episode?
Maggie is able to finally unload a lot off her chest. For years, she and Carrie have been butting heads, and Maggie finally is able to open up to her sister and express her frustration, but also her admiration and love in a new way. It’s a breakthrough for the sisters.