The trouble originated with Li Kun.
Li Kun wasn't exactly an upright person based on his conduct, but he was highly skilled at disguising his true nature.
However, as they say, "In vino veritas." No matter how good one is at pretending, a drunken person will reveal some true colors.
Indeed, Li Kun's behavior at that time was rude but not excessively so; however, opinions on such matters can vary widely.
At that time, Li Kun and his wife, along with Zhou Huai Country, were guests at Mr. Su's residence, where the Head's wife personally cooked. Although both parties were aware that this was a matchmaking visit, for the sake of Su Qianqian's reputation, they pretended it was a casual dinner meeting. Mr. Su, Li Kun, and Zhou Huai Country chatted about work over drinks and dishes, while the women were busy in the kitchen.