The task prompt says that this woman named Ling is adept at meddling in relationships.
In other words, she's very skilled at getting involved with others romantically, and can do so in a variety of situations and gestures.
This female strangeness died from jumping into a river, and her appearance constantly dripping with water suggests a significant connection to it.
And just now, the first person who came into contact with water was Liao Jing, who poured a glass of water for Mao Jin'an after he fainted.
She must have accidentally touched the water while pouring it, and then it seemed she passed the water cup to someone else, who then helped Mao Jin'an drink.
Yan Junze carefully recalled that the person seemed to be... Jin Wei.
And coincidentally, it was Jin Wei who just hugged Liao Jing.