This is long, but would you be thinking a cheater too? Follow on from the stroking in the car question. help!?

The fiance and D known as the girl worked together 3 years back. He has a sexual relatiochip with her while with another woman and she with another man. I let that go, didnt care cause its in the past. So I started carpooling with her to work as we were working in the same town, again, I had nothing against her why not. So she rocks up, he runs out to the fenceline to speak to D knowing I was going to be another 5 minutes as I said that to him before he went out. This behaviour is odd for him because he never done or has done it since. Then we are driving home me and D and she starts confessing her truest love for him, and how much she missed him when she left his work for a transfer. I got angry naturally and stopped going with her. So, she tranfers back to our town, which means she is working with my fiance again after this. He tells me. I get cranky due to things she said. He said he needs her to work for him he has no one else. Fair enough. I fins out they are opening together for two weeks straight not long after her return (they get half an hour free when this happens alone)... I got angry. Said please change your roster and speak to her about her additude toward me, as she was very very rude. He said he did, but really didnt when I confronted her about the rudeness. He never changed the roster said he couldnt. Then, he comes home late, he has a condomn smell on his penis. He came, there was hardly anything - I know his usual, which is alot. This was a few drops of water basically. Very odd. I was pregnant at the time, and didnt wanna get stressed so left it. I told him it was odd though. He said he didnt know. The next week he comes home with pussy smell on his penis. I can taste it. GROSS. anyway denied that. I let it go even though it ate me up. Then there was a condomn missing, no brainer. We only had sex 5 times in 6 months (which sucked cause he knew I was very up for it) Then, he starts coming home really upset, anxious almost. I let it go for 3 weeks of him not speaking or even looking at me sideways. I get really curious and ask him whats going on? he told me just work. I let it go. Kept happening. By this time I had a 3 month old with colic and needed some help from the slacker cause he just watched tv constantly. So we had another talk. I was nice. Too nice. Then after two hours of holding his head in his hands he comes out and says, oh you dont deserve this, we need to spend more time apart and I dont know if I wanna be with you anymore. Meanwhile I thought everything was hunky dory really. I was being the perfect bloody woman. no joke. I asked if it was because of the stress from bubby, he said no he thought she was getting better. He couldnt explain where all this had come from. The next day I confronted him about all the issues, and asked him to help me understand them. He said he didnt know. So I dropped it. Very next day he gets a txt msg saying "call me asap!". No number that was saved in his phone it was random. He left the room, shut the door and spoke to - who else - D. I was angry at how he could have known it was her. He said he just did. Sure because everyone can memorize thier work mates phone numbers. Another fight, he got physical. I got really angry. Then he started crying/sulking. I let him cry. He had no sympathy for me to throw me around like a rag doll. Then he got angry again, and physical again. I said I would drop it again!! The next day, he gets a phone call from his area manager saying they all need to have a talk about him and D. Well, he **** himself. I said you need to tell me before I find out tomorrow (I was going as his support person, really only to see what it was about) he said there was nothing to find out. Meanwhile I know how this man lies as he has in the past, on our child life even. ugh. anyway, I said, ring D I wanna speak all together and sort this out with her husband too. Fiance refused to call her, then finally after saying no im not calling her outta spite, gave in, I said put it on speaker, he said hell no. I said tell her YOU want her to come sort this out. He refused. So another fight. On the way to the meeting he tells me someone has probably seen something with me and D and blown it outta proportion. Out of no where he said that. But yet, here I am still. The meeting was her complaining about my phone cal made to her abuot her rudeness toward me, they found other issues from investigation about work that he wasnt doing correctly, so she made the complaint, but he got in trouble about other things. I find out later that they talked before the meeting. He said delete my number, dont answer my calls outside work etc. This is supposed to be a work relationship only! he made it personal. Now, he masturbated so he says anyway, in the car last year right around the time they opened together. So, go figure I guess? Also, after our big fight, he FINALLY changed the roster so they a seperated...