It looks like Minnie/Monica and Theodore divorced, because she is married to another man in 1940, and is living with her children Florence and Edward.
So far the children I have found for Theodore born 1886 are:
Theodore, born and died 1914, with Blanche
Florence and Edward, with Minnie/Monica
Theodore, born 1937 with Tekla.
I did see one reference to Edward's middle name being Theodore.
This appears to be Florence in the SSDI - I couldn't find an online obit for her.
Name: Florence Alejski
State of Issue: Michigan
Date of Birth: Sunday September 14, 1919
Date of Death: Friday December 07, 1990
Est. Age at Death: 71 years, 2 months, 23 days
I see Tekla was in Pennsylvania, but I find no evidence that Theodore lived there.