And how would Jeremy know that she would comply?
Especially if you keep in mind that recent episode with the terrified gas-man, whom Sheila had attacked. Not very passive that, huh!
Truth is, Sheila was completely unpredictable and did have violent outbursts - and Jeremy would have known all about it. That gas-man was so terrified that he locked himself in his car and was afraid to get out - all because of a "passive, easily led, wisp of a girl"!