Emma Wilmoth Wright - Source for parentage?

Greetings,

I work for Geni and as you can see from the "About" on the Overview tab, there's some doubt about Emma's parentage. If the dates on these profiles are correct, Mary would have been only 9 years old when Emma was born -- that seems highly unlikely. Does anyone have a source for Emma's parentage?

Kind regards,

Mike at Geni