It just occurred to me that Amy does look like she could plausibly be Amy Davidson's mother:
https://st.depositphotos.com/1814084/1794/i/950/depositphotos_17946525-stock-photo-amy-yasbeck-and-amy-davidson.jpg

http://fast.celebrityphoto.com/img/AmyYasbeck071802-G3474A.jpg

https://st.depositphotos.com/1814084/1730/i/950/depositphotos_17303175-stock-photo-amy-davidson-and-amy-yasbeck.jpg