Lisa Vanderpump wasn’t surprised by Jax Taylor and Brittany Cartwright’s recent break-up. The 63-year-old reality star believes that Jax’s previous cheating scandals on ‘Vanderpump Rules’ suggested that his marriage wouldn’t last the distance. Lisa told E! News: “I don’t know what the reason was, but I imagine it was probably something to do with Jax’s bad behaviour. I’m not sure, but the indicator of future behaviour is normally past behaviour.” Despite this, Lisa wishes the former couple – who have a two-year-old son called Cruz – all the best for the future. The TV star said: “It’s a shame …