For people who haven't seen it yet - spoilers ahead!
So we've re-watched from the beginning because I'm obsessed and for whatever stupid reason, first time around we skipped half of season two. Like a dick I'd got bored of it and we stopped watching, and then re-started at season three. So I never knew why Rick was so pissed off with Lori at the start of season 3 but NOW I KNOW! Argh what is her problem??
Shane did save her and Coral numerous times but he also went completely loopy, compromised the group, went renegade, and began to hate his best friend of many years because - like Rick said - made out like it was Rick stealing Lori and Coral away from him, AND he plotted to kill Rick. Lori even had conversations with Rick about this. Yet she's obviously so hideously angry with Rick that he had to kill Shane. I get that she'd have all kinds of confused feelings about this and be sad because - aside from that she might be carrying his baby - they all had a history...but for god's sake woman! Keep it to yourself! HE WAS GOING TO KILL YOUR HUSBAND.
Argh. Do not like Lori. She's a dick most of the time.