As Tirley is on the River Severn - there is around that time, baptisms of children : father: Thomas , mother, Mary, WAGSTAFF

John - 1737
Thomas - 1739
Mary - 1744
Edward - 1746

may be these are siblings and Thomas was a boatman and went up and down the Severn.

What family names did Sarah and her husband name their children?

John WATTS aged 21 a Yeoman of Hasfield, and Sarah WAGGSTAFFE aged 22, residence of Tirley, were married by Licence/Bond - (FOD records)