"Ah... I see. Well I hope that you continue to GET ALONG WELL in the future too." Katherine mused, she made sure to emphasize the words 'get along well' because now that her plan of matchmaking was going well, she planned on creating more opportunities for Lilly and Harris to meet and spend time together often.
Harris had caught on to Katherine's plan, he didn't hate the idea of spending time with Lilly, so he chose to remain quite and not say anything to Katherine, especially upon noticing that Lilly might have a crush on him, he didn't want to hurt the poor girl's feelings.