Seems like estranged partner Scott Disick wasn't invited on this trip for a good reason: Kourtney Kardashian is sick of putting up with his BS!

On Satuday Kourtney took kids Mason, Penelope and Reign on a boat ride, and it looks like everyone had a blast cruising around the crystal blue waters off the coast of Malibu. Kourt allowed Scott some quality time to bond with Mason earlier this month, but we haven't seen him visiting his three children since then.

Though Kris Jenner applauded Kourt for her decision to break things off with Scott, calling Kourt her "hero," it looks like the 36-year-old reality star might be having second thoughts. But will she actually take him back? Not only has he proven himself to be a major party animal, but he can't stay faithful!

A source tells E! Online, "He's trying to get his life together and that includes getting his family back. He's hoping he and Kourtney can put this behind them. He knows it won't be easy. At the very least, he wants to be friends again. He can't believe how quickly this spiraled. He always thought he could keep it together, until he couldn't. He knows he has to prove himself to Kourtney. He needs to show her he can be an adult. That's all she wants. She knows he likes to party, but she wants an adult who will be there for her and the family every day."

We wonder if/when these two will end up back together...