Elastigirl powers and making her ass larger

Elastigirl blushes slightly- “I- what no- this is all the real thing” she say slightly smacking her own ass causing it to wobble slightly but slightly regretting doing that quickly.

TRUE.

“Also it’s not that large, it’s just a bit uh big” she groans crossing her arms, her ass still having a slight wobble to it as she moves slightly.