Knowing this manga either she is mistaking Ryuuka for her mother and will become peaceful when she finds out or it's something adorably stupid.
Either way I love when manga keeps it's fluffy/peaceful premise, no matter how dramatic a scene it's always followed be being a gag, rather than when they take a whiplashing turn to grimdark just for a chapter of drama and try to go back to fluff like nothing happened and they totally didn't just betray the readers and their expectations.
Am I just supposed to ignore the sudden turn author, the wrenching out of my heart and emotions when I'm reading your manga for fluff and healing and get punched in the dick?! If I wanted grimdark I would read 40K or some manga where grim and depressing is the point!