A mysterious potion

Alex was visiting a village she had found. Some villagers tried to trade with her but only one managed to capture her interest. The villager told her that he had a book which had recipes for potions never seen before, she did not doubt this and bought the book.

Alex didn't wait to get home and decided to try making a couple of potions in the village. However, the name of each potion was in a language she did not understand. Anyway, she tried the first one she saw and when she drank it she noticed that her body began to grow and grow. The villager who sold her book ran away from her. Alex tried to reach him but it was in vain. Steve arrived at the village and when he saw the huge Alex he was shocked. Fortunately the potion has a time limit, although...maybe Alex doesn't think being a giantess is such a bad idea, right?