Around Thanksgving 96, a baby happened up my moms's cunt, I never realized it, then on my 12th birthday, she broke it to me she was pregnant, already 2 months along by late January 97. In early February 97, my mom turned 28. From my 12th birthday till spring break, I was kind of real shy, and felt awkward about it, because alot of thoughts of my mom being pregnant back then made my dick hard in all that time. One day on spring break, my mom wanted to go to Walmart, so I thought I'd go around the corner, and hang out with some friend of mine, instead she wanted me to go with her for some reason. When we got there, I thought I'd go look around at some electronic stuff or whatver, instead my mom wanted me with her in the fitting rooms. When we were in the fitting room, what a view, my mom's then 4 months along pregnancy was just barely showing, she'd started wearing pregnancy clothes in I think late February 97. There my mom was, in the fitting room that day, all stripped to her underwear, 2 to 3 inches of bare tummy between her lace bra, and lace panties stretched way over her barely growing baby bump, my dick was so hard in my boxer brief style short shorts, then I took my t-shirt off. That was the first time I'd saw my mom's bare tummy since she'd first told me she'd gotten already pregnant from back in January 97. After trying on few outfits, my mom looked down, rubbed the bulge between my shorts, whispered to me "Hey honey, feel my baby." What a feeling, massaging the front of my mom's panties, staring at her tummy, aroused by her bra, my dick throbbed big time, so big time, I shot lots, and lots of cum through my shorts, some of it dripped on the fitting room carpet through my shorts it was so much. When I put my t-shirt back on, it was more than long enough to hide the crotch of my shorts, so nobody there ever caught anything, both my shirt, and shorts were black anyway. Finally when we both got home, I told my mom how sorry I was for the mess I'd caused in the fitting room, she'd smiled, and told me it was not my fault, it was part of eing a boy. Awhile later, my mom was back in her panties, and bra exersizing to a pregnancy workout video. When I watched my mom in action, my dick got hard all over again in a fresh clean pair of short shorts. Whatching my mom's tummy get sometimes squishy between her bra, and big panties, made my dick throb hard in my shorts. By the last week of April 97, my mom's baby bump was kind of the size of a basketball. When my mom showed off her 2 or 3 inches of growing bare tummy between her bra, and the pregnancy panel of her short shorts, my dick throbbed hard in my briefs so hard, I shot out massive amounts of cum in the crotch of my briefs.