My oh and I have been together for 6 years but in 2015 we broke up for about 6 months. In that time I learned he started seeing and sleeping with multiple people one after the other. There was one girl in particular that even though he was only seeing for a few weeks, told her home, she met his mum and dad, showed her multiple pictures of our 1 year old daughter together, he had to take her to get the morning after pill, they used to sit at his house in the day and hang out together. We eventually got back together after the 6 months were up as it's what we both wanted. He told me all of the above about what happened with this girl. Since then we've had another two kids together (now 3 in total). When I was heavily pregnant with our son only in September last year, I saw he looked up a girl on Facebook. This was really random as they had no mutual friends. I confronted him and he bit back at me and told me I was being nosey. My insecurities from the past just made me so paranoid. He said it was someone from his primary school so I left it there. That was all those months ago. But today I saw this girls name pop up on MY Facebook, I clicked on it to see if it was who I thought it was. I stumbled across her age and realised she is 6 YEARS younger than him. He's 25 she's 19. I realised he lied about knowing her from primary school, I really wanted to know the truth now. So I asked him again, I didn't shout or nag I was just more annoyed that he lied. So tonight he told me it's actually his friends sister and straight away I knew this was another lie as they had no mutual friends and he has no friends with her last name. I asked him to just be honest with me. So he said ok I'll tell you but don't get mad, you always get mad and that's why I don't tell you anything. Not really an excuse to lie though? I can't help how I feel. He said 'I slept with her all that time ago when we broke up'. I couldn't believe he was still searching this girl up. He said 'I found out she was pregnant and I wanted to see'. WTF? Is it just me or is this wrong. It's brought all of the horrible stuff from that time back for me :'( am I overreacting? Why does he care so much to look her up? And why did he lie to me multiple times while I was heavily pregnant with his son?