Heather Rae El Moussa was soaking up a major family milestone as she celebrated her son Tristan’s 3rd birthday in true larger-than-life fashion. The Selling Sunset alum, 38, shared a sweet Instagram post on Monday, February 2, giving fans an inside peek at the Monster Jam bash she and husband Tarek El Moussa, 44, threw for the little one.
In the first pic, Heather posed for a group photo at the Monster Jam arena with Tarek and Tristan, along with Tarek’s ex-wife, Christina Haack, 42, and her boyfriend, Christopher Larocca, 53.
The Flip Off costars looked completely at ease as they stood together in front of the dirt-filled track, celebrating side by side. Heather stayed effortlessly glam in a fitted black tank top, black pants and oversized sunglasses, while Haack kept it casual-chic in a white tank, skinny black jeans, and shades of her own.

Heather Rae El Moussa/Instagram
Another snapshot zoomed in on birthday boy Tristan, who looked completely mesmerized by the monster truck madness. Standing by the railing, the toddler sported oversized protective headphones and a Monster Jam shirt, staring wide-eyed as the trucks tore through the arena behind him.

Heather Rae El Moussa/Instagram
In a final selfie, Heather shared a cozy moment with Tarek, flashing a broad smile as she leaned in.
Heather captioned the post, “Core memory unlocked…” and followers couldn’t agree more, flooding the comments with hearts and emojis. Christina even chimed in with a simple “So fun!!” as fans added reactions like, “Can’t believe he’s three!!!” 🥹❤️🎉
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