Mrs. Jefferson is Rowley's mother. She seems to be often concerned about Rowley such as when he broke his big toe after Greg put one of his dad's dumbbells under a pillow that Rowley kept kicking at Greg's sleepover.[7] She also had Greg apologize to her for what he did to her son. Despite this, Mrs. Jefferson always enjoys Greg's company with Rowley. Although Mrs. Jefferson loves Greg, she does not let him come over because her husband hates Greg.
In the first film, Rowley's mother is portrayed by Kaye Capron, Robert Capron's real life mother, whereas in Dog Days she is portrayed by Bronwen Smith.