Austin knew her question was related to Tati.
He was aware of Tati’s admiration for him.
Nevertheless, he recognized Tati’s feelings as pure admiration. On the contrary, Tati must have noticed that he treated Isabella differently. She probably told Isabella about it in private, but Isabella simply did not have plans for marriage due to her heavy responsibilities.
Austin said with certainty, “No. Although I haven’t succeeded in pursuing her, I’ve set my heart on her. She’s my fiancée, and she