Jennifer Maas TV Business WriterSPOILER ALERT: Do not read if you have not yet watched “Child Care,” Monday’s episode of “9-1-1: Lone Star.”Baby made three for Judd (Jim Parrack) and Grace (Sierra McClain) on last week’s “9-1-1: Lone Star” — and on Monday’s episode, an estranged teen son and his mother made five. Totally unbeknownst to Judd and Grace, he had a son Wyatt (Jackson Pace) with Marlene Harris (Robyn Lively), a barrel racer he can hardly remember having met at the San Antonio Stock Show & Rodeo in 2005.On Monday’s “9-1-1: Lone Star,” that boy comes to find Judd with the help of an online DNA ancestry website and Judd and Grace, just getting the hang of taking care of newborn daughter Charlie following her birth at the tail end of the Fox drama’s weeks-long ice-storm plot.