I am completely confused by the bed.
He slept on the side beside the balcony as his shoulder was sore.
She slept on the side near the bathroom.
His gun was under her side of the bed ( bathroom)
The spare mag and rounds were in the bedside drawer on the side of the balcony. ( usually the two will be together if the spares aren't in a cabinet)
The iPad she was using, when he fell asleep, ended up on his side ( fair enough, she could have used and then plugged in to charge)
But. It is a bed. Not a tennis court.
He was picking up her jeans when he heard a noise. He went to her side of the bed and grabbed the gun from underneath ( whilst unstable on his stumps )
He must have used his hands to steady himself
Is it not reasonable to suggest that if he came to her side to get the gun it would have been clear she wasn't there.
Very clear.
The bedroom isn't actually very large.