Jotnar jumped, or maybe 'leapt' was even more accurate. He was terribly gifted at not causing any massive injury when landing on people, however, whether or not they planned it in advance.
There was decidedly less space on the bed once Jotnar was settled, but Loki crammed himself in, anyway; it wasn't like either of them retained all that much of a sense of personal space, after so much of their lives (independently or otherwise) being spent in theatrical environments. "I'm sorry," he mumbled into her shoulder, a moment later.