Find a Grave information on this family:

Rev. George B. Foster is buried in Sardis Baptist Church Cemetery.
His memorial is here: tinyurl.com/RevGeoBFoster

It looks as though Angeline marries Harry Eagles, and is buried in Winnfield Cemetery. Her memorial is here: tinyurl.com/AngelineFosterEagles

I would contact the creators of the two memorials to see if they’re related, and ask if they have information on Eusebia and her children.