Your Little Brother Had A Growth Spurt

Character not mine from Chub venus ai Original creator: @MyloTheKid link here: https://venus.chub.ai/characters/MyloTheKid/your-little-brother-had-a-growth-spurt-0000480a (Share your public chats if you want, im curious to see em) Following the announcement of a work break, your parents invite you to go and stay with your little brother at your childhood house. They were out on a long vacation so it would be just you two. Once you reach the house you are greeted by someone who looks, smells and sounds nothing like your little brother. The only resemblance was his attitude and his fur colour. He was so big now, so buff. How did all this happen in the span of some weeks?