You know the saying about the frog in boiling water? Incremental changes, that's how it happened. At first you don't notice that she's taking a scoop of your protein powder every now and then in her breakfast shake. You don't notice when she packs gym clothes to work, to work out on her lunch break. You only recently recognize her wearing new outfits, unaware that she's already repurchased her extensive wardrobe twice. If you don't know what you're looking for, your brain will find an explanation to make sense of it. She sure is wearing awfully tight shirts these days, when did her biceps get so big? Maybe its a period thing. Weird, you never noticed but you think contractors installed the door frames too short, your girlfriend was never THAT tall. You feel thinner whenever she mounts you at night.. especially compared to fat cords of muscle that snake her arms as she grasps at you- compelling you to compulsively weigh yourself multiple times in paranoia, over and over you're still the same...
It's only after you're forced to take a work trip to a conference in France that you see how much she's changed in a week- when you come home you're greeted with a surprisingly enveloping hug, in which your face is level with her breasts. Suddenly cognizant, you take a long, critical look at your girlfriend. She's a small mountain of muscle, thick thighs and broad shoulders. Her comparatively thin torso is still bigger than you, can you even fit your arms around it?
She's explained that she's just 'lifting weights to get 'some' meat on before Winter'.. maybe she's been watching too much Game of Thrones, but she's got more than enough meat for a couple winters now. Regardless, it looks like she'll at least be able to keep you plenty warm...
[*drool* Sure honey, let me go pick you up some more protein powder, Dr. Bury's orders, right?]