My husband is a descendant of Cora Magee, who was indeed the sister of the Mary Magee who married Joseph L. Malosh.
I actually have a picture of them and their two daughters, and while trying to label it, I realized that I didn't have the daughters' names. I found the 1910 Census online, where I found the family in El Dorado, Kansas with a 14-year-old daughter named Minnie. So I'm guessing that she's the younger daughter in my photo and the older daughter had already married. But I'm not sure.
I would love to swap information and show you the photo.