This "revenge" is honestly disgusting especially when its revealed the mothers where neglectful shit parents themselves they knew there kids would be the hero party but taught them nothing about adventuring and how to survive despite them being S rank adventurers (the mothers)
like really how are you not going to teach your kids
As for the kids i feel bad for them they just turned 15 years old and immediately the goddess tells them they have to invade demon territory and slay the demon lord basically a death sentence since they where taught literally nothing since birth about how to do business manage diplomacy or even take care of themselves let alone how to fight
Its also pretty clear the mothers don't give a fuck about they're children and weather they live or die