Looking for advice really. Currently feel sick. Found messages on partners phone inviting a woman to 'sit on his face' this was in August. We were together then. Further looking showed messages held in WhatsApp showed her recently asking if he was single would he want more with her than a fumble. His reply was that they both know the answer to that question. Anyway reading back further shows in October she said she hasn't had sex with anyone since him. His reply was wow that was in August. I brought it up with him and he refuses to show the messages in WhatsApp he doesn't know I read them he thinks I saw it as he was flicking through them after I brought it up and asked him to show me her messages. He's sworn on mine and his and my child's life he hasn't been with anyone since we got together over a year ago. I'm Lost. Can't sleep.