Remote still in hand and Sally/Zoe his body sharing mothers (mother?) still unaware of the the device hidden just out of their(?) sight Calvin made more swaps.
He selected his mothers head and swapped it with her crotch, her 40-something face was now wedged between her legs, eyes just below her waist, and her matured womanly pussy was now seated upon her shoulders. He then targeted her mouth and swapped it with her pussy. Instantly her mouth appeared on the space between her sholders and the folds of her pussy now between her legs on the lower half of her face.
He continued by selecting her mouth and erasing it, leaving her sholders bare and unable to speak. .
Next he selected the huge Zoe-head boobs, each was slightly smaller then a yoga ball and covered her body down to the navel. He used the remote to replace their noses with nipples and then grew those three times their size. The dark flesh swelled to the size of a coffee can and made the Zoe boob face look almost clownish with its big thick nipple nose.
Without a head on her sholder now Sally/Zoe was back below the 6foot range so he increased her size until she was a square 7feet tall, having to duck and slide around the doorways of the house.
He went into the mental menus changed a few things as well. First seeing they were still a lesbian couple he changed them to bisexual while also cranking up their sexdrive to max! He also made them attracted to himself while keeping their mother/son relationship intact. Watching them struggle to keep themselves under control around him would be fun. Once he applied those setting his 'mother's' arm quickly went to work fingering herself and dropping to her her knees. Sally likely still controlled the arms still having the 'role' of the head. Two fingers thrust into her pussy, eyes set in her crotch winking and rolling in the throws of pleasure while the other hand clasped around one thick Zoe nipple squeezing it tenderly and making both tit mouths moan and jiggle. She would swap hand between both acts, making the boob mouths lick her juices from her fingers before roughly teasing the huge nipple.
Calvin woundered what he could do next...