Okay, here's my attempt at a timeline (but mine's really long and leaves things out). I'm doing this mostly for myself, but it'll likely be a little interesting to others, too. My life is like a freakin' soap opera!

H: 32 (will be 33 in April)
Me: 28 with D8 & D9 from previous M
Met: Summer 2002
Moved in together: October 2002
Married: Feb. 2004
Talked about having kids, but neither of us really thought we wanted to. I kinda changed my mind later. He was still against it but told me one day that he wanted to have a fertility test to see if he had the ability. Found out he had a low-normal sperm count. He started acting more affectionately around babies in general and then started flip-flopping about having one himself. However, he still ultimately said he didn’t want one. I had not been on BC since 2003, and in the summer of 2005, H started being “not so careful” in the babymaking department.
June 2005: H and I had our first lengthy and pretty serious argument; lasted about 3 weeks off and on. Things reignited and were actually better than ever, IMO at least. Continued talking about taking our chances with getting preggo; H and I finally agreed in late July that we’d throw caution to the wind … but only in months that I wouldn’t have to carry through the summer. Two weeks later, I was preggo.
Aug. 31: Pregnancy confirmed; I was only ľ of a week to 2 weeks along. H is overwhelmed; freaked out but promised he would never leave me like XH did.
Sept. 2-5: Visit H’s parents, and he tells his family. Starting to be excited.
Sept. 12: Second pregnancy test confirmed.
Sept. 13: (I would later find) H has 40-minute conversation with interior designer he’s working with. She would later become OW.
Sept. 16: BOMB; H says he hates me and doesn’t think the baby’s his.
Nov. 21: I’m served papers to try to force the girls and me out of the house.
Nov. 22: H starts coming back around, but still acts distant. At least he’s not saying “I hate you” anymore. Things get “flirty.”
Dec. 6 or 8 (I forget which): H and I ML; he says he thinks we can work things out; talks about coming back home in time and “learning to love (me) again.”
Dec. 10: We go on a date. He tells me he took OW out “a few times” but “nothing ever happened.” He said, “She was really cool. I was just looking to have a good time, but things got too serious. She kept saying she didn’t want to be my rebound.” He asked if I was disappointed in him. I said no. We ML.
Dec. 13: We go to baby's ultrasound together; found out we’re having a boy. H is excited and talks about finding us a new house.
Dec. 14: I go to the house he’s living in to take a gift I made him, and catch him and OW in bed together. Later, I check his cell phone records to find that he and OW have been obsessed with one another, beginning with that 40-minute conversation in Sept.
Dec. 17: H calls me a manipulative b*tch for walking in on him and OW and checking his phone records. I try to ask H to give things a week to settle down before either of us throw our M out the window on emotions. He says no, that he gave me another chance and I blew it, that he “really, really” likes OW and he’s back with her. And as for the baby he had begun to be so excited about, he says, “F*ck that kid.”
Jan. 2006: H resumes legalities. I join in, wholeheartedly.