Well, Kristen moved a little slower, that's why she didn't escape in time with the portrait. But Shem moved like a beast the entire time, so I'm pretty confident he would've escaped in time. All he had to do was grab artifact, swing on a rope, race down the stairs, which really wouldn't have taken any time at all. So Shem probably would've escaped with about 5 seconds or so left on the clock. Shem definitely deserves some blame, but Ashley is even more so to blame. Since she didn't use the Forest/Shrine passage. Plus,
both players wasted time by climbing down the ladders. So without those mistake, they could've easily have won. Oh well, still a great run nonetheless.
