Samuel and Mollie were living with their son Amos in the household of Amos and Annie Miller (Mollie's parents). Their son Amos (age 3) was identified as the grandson of Amos Miller.
↑ It is possible that Amos's birth year as given in Find A Grave (1875) is incorrect. Regardless, he appears to be Mollie's son and his parents likely married before he was born.