He could have carried Sheila.
She was very light & drowsy. Probably asleep and it was only 10 yards.
Lots of options. All we know is he shot Sheila twice in his chosen location & received no.resistance.
If someone picks you and carries you from bed, Halpierdol, ten pints, full of curry or what you are going to wake and react
That's not to say he couldn't do it.
I would say Jeremy is about 5 11 tops Shelia was 5 7,