It was Summer right? I swear Ruby is Qrow and Summer's child who was raised by Tai. Because when Summer died Qrow started drinking, and was too immature to take care of Ruby. Therefore Tai, who also loved Summer, raised Ruby.
"We told him it was just a kilt. He'd never worn a uniform before so he didn't know. That is terrible. The girls all said he had nice legs. I did that jerk a favor." (Not a kilt by chaoticshero) - Qrow