Once you arrive home, you excuse yourself to the bathroom and decided to make a few minor changes.
First you decide to increase your back and shoulder muscles to counteract the new muscles. With the increase in tone you feel an immediate relief, your boobs feel less strenuous now. You also notice an improved posture which only makes your gigantic tits seem bigger and perkier. While you're at it you tone up the rest of your body, nothing overboard, just an improvement.
You remove your shirt and see your new J-cup tits held up in a magically created bra. Wondering what they look like bare you remove the bra an watch they drop. The massive mounds of flesh jiggle and sway but they don't sag as much as you expected. You put your shirt on, you are home anyway, and leave the bathroom.