This made her feel like Chen Feng was having an affair with a mistress, cleaning up after the fact, and she was that mistress.
Chen Feng spent a few minutes wrapping things up before saying to Jin Xinyan, "It's getting late; they'll be back soon if we wait any longer."
Feeling like a mistress herself, Jin Xinyan couldn't help but have mixed emotions, but she was a clever woman. Instead of throwing a tantrum at Chen Feng, she joked while smiling, "Otherwise, I'll stay and meet them. After all, they already know about my relationship with you. I've met Sister Mengting; what's your other woman's name? I don't know her yet."