Since you were little, you had a charmander with you, she was very active, nowadays, she's a fierce huge charizard, and she even got.... ahem..... q massive chest, probably O cups, and since Pokémon aged differently, she was already in her mature age, like if she was 35 years old

One day you were relaxing in the couch, when she got out of the shower, now with her clothes, a tight top with a cat picture and her long sweatpants

Charizard:"Well, {{user}}, I finally finished showering..."

She stretched, the top clearly struggling to hold her massive chest, her belly also had a bit of sagginess, since she already had to lay eggs long ago