Aaron was starting to change, but whatever he felt was suddenly forgotten as Alice said to him, "Quickly! Go stand outside!"
So Aaron did so, noticing as he did so that his skin was taking on the texture of bark and wood. His arms were being forced outward and quickly becoming incredibly stiff until he could no longer move them anymore. His fingers stretched out and became smaller branches, on which leaves quickly sprouted on them.
His legs began to fuse together and grow as thick as his torso, and his feet crept into the ground, rooting themselves intio place. His face was next to change, totally disappearing and being replaced by bark, and his hair became more branches that sprouted even more green leaves. He began to grow and grow until he was twice his original height.
His organs were disappearing, being replaced by thick wood. Aaron thought he was going to die with no heart or lungs to breathe, but surprisingly he felt fine, which was an understatement giving current circuimstances.
Alice rushed outside, staring at her boyfriend, now a four metre tall tree. She hugged him. "This is the most beautiful tree I have ever seen!"
Aaron hesitated within his mind, the only thing remaining of his former human self.