My Brother and I did a DNA test with the Big Y. We found we’re not full brothers. My Younger brother is by moms Grandpa, the DNA test didn’t tells who his father was but who he wasn’t. After confronting mom, she said it was nobodies business so we talked to Gramma, she said her dad was always h**** and he talked mom into giving him a poke behind the barn when they were drinking after a wedding on the farm. We asked if she knew he was cheating she said “That man had an eye for chubby women but would settle for anyone 9 to 90, blind, crippled or crazy.”