Very confused

I just overheard my drunk parents yelling at each other for the 1000th time, and my mom said my dad was in jail for over a year while she was raising my brother and I???? I knew he’s gone to jail a bunch before my brother and I were born, don’t know why, along with my mom when I was in 8th grade for a DUI, but uh... this is very new since I don’t ever remember him being gone.