The problem with Clark and Bruce was that Clark told him everything. She might have married Clark, but Lois had figured out years ago that Bruce had some weird, unspoken bond with her husband that was equally as strong as her own, if completely non-threatening. She didn't exactly get it, but she didn't really have to.
"He probably has," Lois sighed, lightly tapping her fingers on the tabletop. The question was, what did that mean? "Well... we know he can be protective as shit when it comes to those he cares about," and there was no doubt in Lois' mind that Bruce cared about Kara; probably like she was one of his own, but she couldn't be certain.
"But he's definitely not going to be as bad a Clark is," she decided. "For one, he's a science guy, so he knows all the biology - and he's been studying Kryptonian physiology for years now; he probably understands your body better than you do." Another though. "He's also been raising teenagers for awhile, so he's probably been through this whole dating thing a few times before. Just look at Dick."
Lois shrugged. "Maybe you should tell him yourself."