Sofia joined the former couple and several other KarJenner family members in Aspen, Colorado on Friday.
The trip also included Kendall Jenner (who posed near-naked while there), Kim Kardashian, Kanye West and their three children.
"Everyone has accepted Sofia at this point and she has been able to tag along and be a part of the family activities," a source told E! News over the weekend.
Sofia, Scott and Kourtney also spent some quality time together in Cabo San Lucas, Mexico earlier this month. They were spotted enjoying a nice evening out and also getting in a good tanning session while there.
All three were also in attendance at an art exhibit in Los Angeles back in November. So will we be seeing more outings with this interesting party-of-three in the near year?
Do you think Kourtney is finally cool with Scott and Sofia as a couple? Sound off in the comments.