This happened to my wife and I...when we moved in together after finishing uni she was about 125lbs and very toned from all the sport she played...we were known among our friends as the "fit couple".
As her workload increased however the sports started to take a back seat and I noticed some extra pounds were starting to creep on, particularly around her waist, hips and bum. She wasn't oblivious to it either and would often make comments about needing to exercise more, or watch what she ate, but never got around to doing anything about it.
I'm naturally tall and slim, and was playing a lot of football at the time so was in the best shape of my life. Naturally I was eating a lot to fuel all the activity and my wife fell into eating similar sized meals, but with a very sedentary job and no real exercise it started having an even bigger impact on her figure. Over the first two years or so of us living together she piled on nearly 45lbs, reaching a highest weight of about 169lbs. As she's quite short the extra flab was very noticeable, especially as she carries most of her weight in her belly and lower half, and she also developed very noticeable cellulite on her flabbier thighs and bum.
I obviously loved seeing and feeling how much fatter she was getting, especially the cute spare tyres which would bulge over her increasingly tight waistbands...there would be a period of denial each time she needed to buy bigger clothes so seeing her squeezed into them was a pleasure. Ultimately she went from a UK size 8 to 16, which was a big difference.
Obviously piling on that much weight when you've previously been a fit girl draws lots of comments and teasing from friends and family, and it was a big turn on for me when that happened...there were a few particular occasions when she was in her bikini at her biggest, looking very flabby and out of shape (in contrast to tall, fit me)...people would have previously commented on our height difference but the comments started becoming about my wife's invreasingly curvy figure in contrast to my slender frame :-)
6 years