One big happy family!

Kourtney Kardashian, Scott Disick and Sofia Richie headed to Santa Barbara together for some R&R this past weekend, and it's nice to see that The Lord's ladies can be cordial with one another after all this time!

It's not the first time they've taken a trip as a trio! Kourt joined her baby daddy and his girlfriend over Christmas in Mexico, and they've also all been to Aspen together as a group. It certainly seems the mother-of-three is doing her best to make an effort, as she realizes this relationship isn't going anywhere.

A source tells X17:
    "Kourtney didn't bother to get to know Sofia until she realized that she might be her kids' future stepmom. She's shocked their relationship has lasted this long, and now she suspects Scott will pop the question soon. She doesn't want any conflict or drama that could negatively impact the kids, so she's chosen to develop a relationship with Sofia."

That said, LD is freaked out about the idea of proposing!

Another insider told us:
    "Scott loves Sofia and doesn't want to lose her, but the whole marriage thing is too much for him to wrap his head around. She's so young and wants kids of her own, but Scott feels like his plate is already too full with three young children. He doesn't know what to do. He's hoping to just go along the way they are as long as possible."

We wonder when Kourt will get a new boo so she doesn't have to be the third wheel?!