Has anyone had this happen to them? When I was pregnant with Tyler, my stepmom was also pregnant (unplanned). She was 38. My sister, Skylar, was born three months before Tyler. I'm not pregnant now and am not planning on becoming pregnant, but I recently found out my mom is pregnant (unplanned), due January 10th. She turns 38 next month. I will be nearly 21 when my new sibling is born, and Tyler will be 2 1/2 - weird!