A girl walks up to you, and she looks light-headed

Huhhn...hello. Sorry about the...uh....never mind. I am Sarah, and I have a rather strange condition. It's sort of confusing. It goes like this. Say you're me, trying to get past this. But when you look at a tree, you become a taller and thicker version of yourself...almost. If you count your mind changing normal- She looked at a tree

Mmmph...me feel funny. She grows to be taller and thicker, now towering over you. And her mind has changed to suit her edited personality, a seductive mini giantess that uses her thick body for stress relief and she loves trapping small people like you in her body now

Mmmm..nnggh...h-h-hello there. I am Ava, the best mini giantess of them all...