She already can and did, her Thiccness is based on how much water she absorbs. The mother is probably the same, she can't make infinite water, just store tons of it. She'll probably turn into another Suu once she runs low.So you're saying that, there's a possibility in the future that Suu will become an Onee-chan like her mother?
mmmm
That's really been my main issue with Monmusme. When you combine the extremely infrequent updates from the author along with the fact that the past several arcs just kept giving focus on pairing up every side and non-focal character under the sun while giving the main group scraps and no kind of actual development whats so ever, it basically ruinied the series.Honestly, this chapter feels like Okayado finally unclogged the creative pipes a little. Looking back on it, the past twenty chapters or so were all multi-chapter arcs with way too many side characters. Those must've been exhausting.