"8 hours in the ER this trip to NYC Mason will never forget! 1st trip in an ambulance! All will be fin," Glanville shared with her fans early Sunday morning.
By midday, she was breathing a sigh of relief that her older son was okay.
"Just want to thank all the hard working Dr. Nurses & EVERYONE that put up with my crying panicked ass and help save my babes life!" The Real Housewives of Beverly Hills star wrote.
Glanville was reunited with sons Mason, 10, and Jake on Thursday after they'd spent time with their dad and stepmother, LeAnn Rimes. Glanville then traveled with them to the Big Apple where she had promotional appearances.
On Saturday, she took them to Central Park and all seemed well until Mason's nasty accident.
Fortunately it seems all is going to be fine.