Jenny Callazzo, a 37-year-old stay-at-home mom and boutique owner, made the heart-wrenching discovery on a Thursday morning when she found her 18-month-old children, Locklyn and Loreli, unconscious at the bottom of the pool. Despite immediate efforts, the tots were pronounced dead two hours later, according to the Daily Mail.Jenny resides in a $565,000 home with her grandmother, six children, and 42-year-old husband Sonny, a marketing executive. A relative shared with the Daily Mail that the great-grandmother’s oversight in leaving the back door open allowed the twins to slip out unnoticed, leading to the tragic incident.