I think tried to manipulate Maria into dropping the rape charges,
(which may or may not have taken place; was she a scorned woman, trying to get back at ?), and probably to have more sex with her....
by telling her a bunch of BS.
Maybe he told her he cared for her, would leave his wife, that they'd be together in Mexico, etc. He hadn't planned for the pregnancy to happen and / or for Maria to not abort it. Maria may have threatened to tell Christina, also... if he didn't hurry with their plans.
Maria may have still believed his cockamammy BS, that they were going to be together soon, that everything would work out, that he had friends and family to help with their new baby, that he knew doctors in Mexico that would help her, that he'd drive down in a few days or weeks to meet her, blah blah blah..... and thus the reason she agreed to buy the next bus ticket out of there. (I wonder if he had someone ready to pick her up in El Paso and take her into Mexico and .... ??? Or was he go planning to go there himself and...??)
Anyway, after they purchased the bus ticket, and he kissed her goodbye, with fake tears and fake promises.... Maria went to her home to pack her things, to leave a note for Durham, and to call her Mom, saying she had decided to keep the baby and that she had lied about the rape, and was dropping the charges, and was leaving the MC.
(Mom was definitely GRRRRR at Maria, feeling she was actually lying then.)
After Maria and purchased the bus ticket together, he went back to his house, to get ready for the Xmas Party that afternoon, and to meet up with his wife and buddies.... probably thinking all the while that all his troubles, AND the rape/adultry charges, AND Maria would soon be long gone.... as in the next day, heading for El Paso!
BUT! Maria had a change of plans... prolly after, and due to, her phone call with her Mother. She was convinced (or came to her senses when she realized) she'd be so far away, having the baby, with no medical coverage in a strange town, that it was a ridiculous plan, that the father would never join her, would never leave his wife... and that she, Mom, told Maria she'd be be there for her unconditionally and help with the baby.
Maria decided Mom knew best (don't we always?) and was right about everything.
So Maria then went to Laurean's house, (he wouldn't answer her phone calls, cuz he was in the shower singin' and happy dancin' )....
to tell him that she changed her mind.
I can only imagine his expression when he saw her standing at the door...
and then told him she wasn't leaving, that his "PLAN FAILED".
He got angry, no make that f'ing fuming furious!.
An argument took place, she threatened to tell his wife.....
and the rest we know about.
That's one of my theories.
But then on the other hand, I have another theory that involves Christina from almost the very start, when she first learned of the rape charges, which she claims she had known about.
Or maybe when she first learned of Maria's pregnancy.