Seeing Stella.
He became so confused at that moment, he didn't even know what to think. The man was the one that drove the car to the front of the building, so he came out of the driver's door. He strolled to the backseat door, opened it, and two children came out of it, a boy and a girl. So, does Stella have children too? And was the man her husband? Like, what is happening here, Leonard was becoming more confused.
He waited to see if Stella would come out of the jeep, but she didn't. The man held the children by their hands, strolled to the mini gate, opened it, and took the children inside. Then he opened the main gate, strolled back to his car, entered it, and drove into the compound. Since Stella didn't come out of the car, then she was most likely not part of that family.