Who is Aunt Zena from The Rocky Road to Romance and what is their importance?

When Steve first jokes about his Aunt Zena's matchmaking attempts, Daisy believes he is making her up. However, when Steve takes her to the charity dinner, Daisy meets the real Aunt Zena, an active older woman who enjoys hosting such functions. In fact, she greets Steve's girlfriend excitedly. However, it is Aunt Zena who shares the truth of Daisy's whereabouts on the news following the charity dinner. Therefore, Daisy's safety hiding at Steve's is compromised.