I thought about that, too - that they had their marriage annulled later. I agree with your whole post.
I was cleaning up my phone and forgot about these screenshots I took almost a year ago of that "Cooking Comedy" Shane made with his first "nurse/girlfriend" Shannon - before an influx of people in their comments section started connecting the dots about all his hot, blonde supposed girlfriends and he got it scrubbed from the internet. I felt he was gross and creepy in it (like the showering video with Hannah) and coercive towards Shannon, like he probably was to get her to play his girlfriend. The first 3 pics are of an excerpt from the intro, in sequential order, which seemed seedy to me. 1) First, there's Shane and he said something like "It's going to get filthy here" (or dirty...I can't 100% remember, but it was synonymous with that). 2) Then it shows Shannon with that...expression...and insinuating nudity? Why that image of her, of all things? 3) After that, it goes back to Shane making this gross, pervy look at the camera. It made me shudder.
Shannon is wearing very short shorts and bends over a couple of times at the oven, which is on brand with Shane's "girlfriends" showing off their "assets" in his videos. Although I not believe she is as brazen as exhibitionist virgin Hannah.
Another situation in that video that disgusted me was him insisting that he taste the cake batter after Shannon told him not to. Repulsive. After slobbering on the spoon, plunking it back in the bowl, and drooling in the batter, he demands that Shannon take a bite of it after it was baked. You can see she was grossed out, knowing his spit was mixed in it. If I remember correctly, he got his "grubby" hands in there at some point, too. He's such an asshole.
So, that video has disappeared but at least there's some documentation here
(Screen of video thumbnail attached)
Lastly, a pic from that Rainn Wilson documentary on Shane, of this girl who reached out to him because she thought they'd make great friends (although he was pretty unenthusiastic when talking about it). Now, would he be successful if his "wife/girlfriend/nurse" looked average like her? Of course not. In one way or another, he asked/hired Shannon, Anna, and Hannah to play this role because they fit his dream girl fantasy and business model. I don't believe any of these "relationships" were organic.