My Point of View
Meissa looked at Okab with a stunned expression.
"Mates follow their mates wherever they go?" she said as if stating it rather than asking it.
Okab nodded. "Yes, my dear. So, if Lerna is killed, Rigel will follow her. However, for that they need to be mated and marked. I don't know whether your brother has already marked her or not."
Meissa got up from the bed and started pacing the room.
Okab watched her pacing up and down. "What is the problem?" he asked. "You look like you are in tension! Didn't you like the plan?"
"It's not that!" she paused for a moment and looked at him. "I am trying to remember whether they are mated or not."