Ulterior motives for expressing condolences? Well, since he clearly wasn't trying to get into her pants, he had no idea what sort of ulterior motives he could have for expressing sorry at her husband's death.
"I'm still trying to see what's wrong with it," he muttered. "It's just hair. Isn't as if it's dirty or anything." He'd had to wash it after the monkey attack. Of course, he was still rather certain Eden was insane. So it was likely just her.
If he were not who he were and lived the life he'd lived, if he hadn't just finished a scrum with her, Cathair wouldn't have believed that. "Oh, so you're a lady pirate," he mused dryly. "That explains a bit."