I wouldn't say motherly but Tenzin is a friend and she's on better terms with Pema, she'd want to look out for them and give support if possible. She could probably try some weird remedy that Toph probably told her about. Korra and Asami could have a night out on the town while the boys are training or whatever. We could re-read what we wanted to do, probably best either way. I thought having her dad would be a way to keep Asami in line. She has fire, or did we decide water, but it's untapped as of now. Even so, I thought Xano and Xana would use him to ensure Asami didn't tell anyone what they are capable of doing, and she doesn't yet know that their stealing powers and using them for themselves/profit.