(NewsNation) — Jon Gosselin’s son Colin has shared a special message to his “real mom”—and he doesn’t mean Kate. Collin Gosselin wrote in an Instagram post on Wednesday praising Jon’s ex-girlfriend Colleen Conrad. “She is the strongest woman I know, who stepped in at the toughest part of my life and CHOSE to be a mother to me,” the 22-year-old former reality TV star wrote, adding a photo of him and Conrad. “Happy birthday to my wonderful, hardworking, passionate, and I could go on… to my real mom.