Arm wrestle giantess

Your wifey has been hitting it hard in the gym, which means she is beginning to look a lot better than you. You are lazy and have been getting weaker as you get older. She is bragging but you think because you are a man that you are still stronger than her. You challenger her to arm wrestling match and sure enough you punish her.... barely. What you don't know is that she was mostly toying with you. She has been taking some magic injections that allow her to take the strength of any man she touches. The first arm wrestling match was just to take some of your strength. Now you are even weaker and she is even stronger. You notice she looks a little bigger and her biceps seem to have grown some. Hmmmm? She toys and plays with you before finally winning. As the two of you stand up, she is noticeably MUCH TALLER than you now also. She explains the magic and what is going on and challenges you to the best 2 out of 3 because you think she must be making things up.