Sienna Miller was spotted in an awkward situation as she was caught snogging her boyfriend Oli Green in front of her ex Tom Sturridge at Wimbledon.The 40 year old couldn’t keep her hands off her man as they sat in Centre Court on Sunday and the couple were seen at one point during the games engaged in rather a passionate kiss — right in eyeshot of Tom. Sienna’s ex partner, 36, was sat directly behind the couple with his girlfriend Alexa Chung, 38, and attempted to appear unfazed at their intense make-out session as he concentrated on the tennis game.