The amicable exes have a history of leaving flirty comments on one another's posts. Last month, Scott praised Kourtney, writing in a family photo on Instagram, "Thank you @kourtneykardash for being the best baby maker in town, I couldn’t have asked for a better person in the world to have these amazing children with, I love u and our family more than anything in the world 🌎"
"Going to Mexico was a nice way for the both of them to unwind, relax and spend more time with each other," a source previously told ET of the trip. "Amelia is easygoing and gets along with Scott's friends, so they're able to just kick back and have a good time."
As for how Kourtney feels about Scott and Amelia's relationship, a source told ET, "Kourtney isn't bothered that Scott is hanging out with Amelia Gray Hamlin and is so far past thinking about him in a romantic way. She knows Scott better than anybody and she is supportive."