"Mm.  Yes, you would need one of those to practice that sort of technique effectively, wouldn't you; let me see what I can do to remedy that."  She hasn't been making anything particularly massive today, yet...

She can afford to expend some of today's mass allotment on another training tool, especially a simple one like "a somewhat larger than standard reinforced punching bag".

"Oh wow, that's gonna be a big help!"

Yeah Momo's getting kissed for this.

"It was just the right thing to do?  It's not as if it won't help the both of us, really."