The 68 year old played Ann Romano, the mother of Bertinelli's character Barbara, on hit U.S. TV soap opera One Day at a Time for nine years, ending in 1984.
The pair has remained close, and when Franklin announced her new health battle last month (Sep12), the Golden Globe winner rushed to be by her former co-star's side.
A source tells the National Enquirer, ""Valerie has always been there for Bonnie, but never more so than now. She's even cooked hearty Italian dishes for Bonnie and delivered them personally. Bonnie was so grateful!""