Talk:Vidalia/@comment-26181771-20150409221321/@comment-26202330-20150411025251

Based on the fact that

- She has an onion-themed name.

- She resembles both Sour Cream and Onion.

- It is heavily implied that Marty had crazed sex with her (and possibly her "wild friends" as well).

I'd say it is very likely that she is the biological mother to both Onion and Sour Cream, with Yellowtail being the biological father to Onion and Marty being the biological father of Sour Cream respectively.