The Bachelor's Arie Luyendyk Jr. and Lauren Burnham introduce newborn son Lux to big sister Alessi

Arie Luyendyk Jr. and Lauren Burnham Reveal Baby Boy's Name and Share an Update on Daughter's Health

Lauren Burnham Requests Prayers for Newborn Daughter Who Has to 'Stay Behind' in the Hospital

Lauren Burnham Asks for Prayers for Newborn Baby Girl Who Has to "Stay Behind" in Hospital