Masturbation on wife’s biceps

I want share with you this my fantasy. Recently my wife started again working out in the gym after a few year of stop. She’s doing weight lifting and the improvements on her body are quite evident. Last evening, she started masturbating me and I got very excited watching her bulging veins on the right arm while working hard. However due to the gym soreness, her arm became tired very quickly and she switched to her left hand, that never used for this before. Well, I know in everyday life she’s totally right-handed and never use her left arm for anything, and in fact she couldn’t coordinate at all in the movement and had to swap back to the good side. In this I clearly noticed that her left arm muscles (bicep, tricep, delt, forearm…), were much smaller and with just a few veins if compared to the right.
Don’t know why but I found this asymmetry very exciting, so I merged some recent pics to compare the arms (see images). I think it’s clear the right is really much defined than the left.
Now…start sharing your comments and fantasy on this!!