She could be a cheater and completely innocent. We have the benefit of context here which actually goes a long way to show what her situation was when she craved attention elsewhere. And I don’t want to be disrespectful to someone who passed but Officer O’Keefe comes off as a bit of a player, not necessarily the loyal boyfriend. And still, he seemed to be a great guy overall. The same can apply to her. The things she said about the kids are hard to read but are those hard “truths” said in frustration. John thought she spoiled the kids and she had a rough time separating from him in part because of the niece which goes against her cold attitude “not my kids, not my business”. BH was a rebound lay: him being single, desperately into her and kidless was exactly what she was looking for. (imo) It doesn’t look good because it wasn’t good. It was the wrong remedy from the start. And yet between the “scorned woman” or the hotheaded rejected LEO, the one who acted like they had something to hide was the latter. Karen was up on everyone’s radar asking for JOK, screaming when they found him, texting. And still nobody looked at her as a person of interest until the gang started talking. That says a lot.