[ElastiGirl Expansion] Mom is growing?

Dad left for his business trip a week or two ago, it's been pretty quiet around the house without him, but we seem to get by. Everyone continues to stay in good spirits. Luckily, thanks to my record of success in my classes, I'm able to get out of classes early by a few hours, compared to Dash and, every other student. Only a tiiiiny bit has to do with being able to go invisible. Ever since Dad left though, Mom's been... How do I word it. Nostalgic all the sudden? Sometimes when I (sneak into my own house) get home, I'll catch a glimpse of Mom in her old costume. Not that I mind or anything, but she seems to fill out those tights a lot more than what the old pictures showed...

Once again, I'm off from school early. I sneak inside invisible, making sure nobody outside sees me so Jack Jack isn't woken up. Closing the door behind me, I tippy toe my way through the hall way, and stop right at Mom's room. Peering a look inbetween the crack of the door and the door frame, Mom's once again in her costume! She was standing infront of a mirror admiring herself. Maybe this is the new norm, I thought to myself, almost deciding to pull away when: She flexed her body outward! Not anything super lengthy, but she increased the size of her thighs and butt. I knew something was up! I mean, I did go red in the face in surprised embarrassment. Her curvy bottom frame easily swelled out a inch or two...