Jeff thought "Well... Maybe if I made Megan into a boy we could bond a bit easier?"
Megan thought to herself "Hm... Mom has been trying to get more active, is annoyed at using that stool to get to the high shelves, and needs help with the heavier groceries... How about we make her a man to make her taller and stronger?"
While their mother thought "It would be nice to have three girls in the house, and we could bond a bit easier as all women than with just one guy... Just gotta make sure that sexuality changes as well and... good."
As the changes went through Megan may not have noticed her small chest retreat, but she did notice something crawl out of her crotch. Their mother noticed herself growing bigger and have body hair sprouting all over her. Although she didn't notice her T-shirt and Jeans change that much. Then Jeff felt odd as he shrank down a little as her breasts surged out into D-cups, and even more she felt that is was odd that she was staring directly at a nicely sized pair of breasts and not feel excited in any ways.
Jeff stated "...We all changed genders." then she and his father said at the same time "And here I was trying to make it easier to bond-"
The young boy said "And I was just thinking that mom would like being bigger."