Based on the conversation on the show, the two of them have a sleepover at Chika's fancy house. Yumiko's happy to see Chika enjoy the dinner she cooked. Then for some reason, they end up taking a bath together. How did it come to this?!
There's some for your mom too, 
so make sure you let her know.
،تركتُ بعضه لأجل والدتك أيضًا
.احرصي على إبلاغها بذلك
He dejado un poco para tu madre,
acuérdate de decírselo.
Deixei para sua mãe também,
então avise ela.