```
Adults who have experienced the ways of the world all know what that sound signifies.
Wen Qing, the butler's face revealed a hint of embarrassment.
Old Madam Gu's brows furrowed deeply. Wasn't the room next door a guest room?
Who was in there?
Shi Yuan?
Making such a sound in someone else's home, a trace of displeasure appeared on Old Madam Gu's dignified face.
Upon hearing such a sound, Song Yuzhi quickly recognized it as Shi Yuan's.
She wasn't in Gu Siting's room but in the guest room instead?
She must have hidden in the guest room after having an argument with Ming Yao, right?
With that thought, a smile curled up at the corners of Song Yuzhi's mouth.
Shi Yuan must have made that sound deliberately to lure her and Old Madam Gu over.
"Mother, since Shi Yuan is in the guest room, I will go and call her out to ask about the situation," said Song Yuzhi, glancing at Gu Siting, "Siting, you have to keep your word."