you could also make nishys adult form very ara ara if you know what i mean
im thinking maybe current nishy is 18 young and it explains the decent change in size her current form is 18 and the larger mommy version would be saw 60 years old with big ara ara energy and a very lewd mind like the nishy we know and love she would maybe be much more shy when shes younger but with the ability to just instantly age up to 60 she would be much more experienced and in turn
hmm so idk if i should go this detailed but my thought here is with the new ara ara style nishy maybe mobs instead of wanting to dom nishy will sorta lay back and beg to be dommed idk if thats something that interests you
sort like the size maters to the mobs so small nishy will always be semi forced but large mommy nishy would be the forcer not litteraly forcer but more domination