I just discovered an artist named ‘Kiwine’ at deviantART who loves to draw large breasted women. He doesn’t do a lot of breast expansion or growth related subjects, but he did the one at right as a commission for a fan. It shows Lara Croft of Tomb Raider bursting through her top as she recovers a ‘cursed’ idol.
She doesn’t seem all that upset, and there are other depictions of Lara Croft in his gallery that are similarly well-endowed. Other fan favorite characters are also represented. (Click on the image for his gallery.)