52.25 into the Lifetime movie we see a dramatization of Kessinger finding out Shan’ann was pregnant. After cutting to a close-up of Kessinger’s eyes peering at a computer screen we hear a voiceover from a reporter saying:
“Shan’ann is fifteen weeks pregnant. I know this may be a tough question, but did you guys get into an argument before she left or anything…?”
Watts answers:
“It wasn’t like an argument or anything. It was like an emotioonal conversation…”
The actual moment a similar question was asked was at the very end of the Sermon on the Porch, basically 15 minutes into it.
Listen a clip of that moment here.
In the dramatization Kessinger is shocked. Scene cuts to her calling Watts that night and him saying the child isn’t his.
A few obvious problems with this scene:
1. Kessinger was likely at work when the news footage first aired, whereas the zoomed-in scene suggests she’s at home. Although the TCRS position was initially that Kessinger had to have known about the pregnancy all along, this position changed in late 2018 to one where she found out about the pregnancy on Monday afternoon or Monday night [when Watts told her the baby was not his], or very early on Tuesday morning after additional internet searches. 
2. More likely Kessinger found out online about the pregnancy, rather than from television footage or from Watts. It’s unlikely the clip where a baby is mentioned actually even made it into the news reporting. It’s an open question whether Kessinger ultimately found out the truth about the pregnancy via Facebook or on the news. One good reason to believe she didn’t find out via Facebook is because Kessinger herself wasn’t on Facebook. The first report of Shan’ann missing – and that she was pregnant – was this one on Facebook.
The first online news report was from KDVR[Fox Denver] published late Tuesday morning:
This timeline corresponds to Kessinger’s marathon internet search starting at Tuesday noon for news.
3. In a recent documentary, Agent Tammy Lee said law enforcement watched the Sermon on the Porch at approximately 17:00 on Tuesday afternoon. It’s unlikely Kessinger – who was at the center of things – would have found out was going on when everyone else did, including law enforcement.
4. Kessinger was already actively Googling for news about Shan’ann starting at midnight on Monday and – as mentioned – around noon on Tuesday. It’s likely during these searches she would have discovered news of the “pregnant mother” missing as early as Monday afternoon or as late as Tuesday at around noon.
Clearly by 17:00 on Tuesday the penny began to drop for Kessinger that Shan’ann and the kids were in real trouble, and if they were, she was because she suspected – rightly – that Watts was involved, and why he was involved.
The moment dramatized of the adulterers discussing the pregnancy likely didn’t happen on Ceecee’s bed, nor the bed in the basement, but the bed in the main bedroom. We know that by Tuesday Watts had put new sheets and pillow covers on the bed in the main bedroom, and also laid on that bed.
The conversation with Kessinger on the matress probably took place late on Monday night, and lasted 51 minutes, but there was also a second call at 02:07 early on Tuesday morning.
Six of the Darker Aspects the Lifetime Movie Got Right – Patreon
Kessinger definitely knew from searching Facebook about the pregnancy. She claims that Chris told her it wasn’t his baby, thus his desperation to get rid of his family before the Gender Reveal. Maybe she just wanted to believe Chris? Doesn’t make sense considering how open Shan’ann was about the pregnancy and that Chris was obviously the father. She had googled Shan’ann a full year ahead of the affair, so she was obviously well versed in her massive digital footprint. There was no way she wouldn’t look at those obvious bread crumbs if she were involved in an affair with Shan’ann’s husband.