Jon felt his body tingle as his dick budded off arms and legs. He then looked down in suprise as karyns chest flattened and her facial features became more rugged.
Jon feld his limbs start merging together, A forskin sliding up his body.
What didn't change however was size. Instead of a normal sized Jon with a tiny Karyn growing from his crotch, you had karyn as a tiny Jon and Jon as a human sized dick growing from her crotch.