Brittani on Smothered opened up about a condition which gave her 5-year-old self the “body of an 11 year old”. Her mom, Mary, revealed Brittani has a “missing gene” which fans thought was autism. The rare condition meant Brittani was forced to give up competing in beauty pageants when she was younger. Mother-daughter duo Brittani and Mary have returned to Smothered. The TLC pair use to shower together every day, and enjoyed mother-daughter colon cleanses. Brittani was diagnosed with congenital adrenal hyperplasia which affected her greatly while growing up. Smothered’s Brittani has a rare cond…