Theory: Marjorie is "socially acceptable" version of Morty
She wears the same yellow shirt and blue pants with Morty, yet she's completely the opposite of him. Morty is a skinny, young boy, and Marjorie is a chubby, mid-aged(or older) woman. This must be meaning something. Maybe it's coexistence of Ted(Rick)'s subconscious avoidance of guilt and seeking for who he truly loves at the same time.
Nonsense theory: This scene is the editted version of Morty's memory.
More detail under the cut (⚠️TW: Incest, SA)
Considering the whole plot of S4E6; Never Ricking Morty is about the Story Train with a bunch of stupid stories that doesn't make any sense, I came up with this theory: He DID get assaulted at that moment. After that, Rick wiped his memory, changed what he did and said, and then replaced his memory with the eddited version. That's why he suddenly started yapping about being proud of Morty using money and then asked him to give his grandpa a kiss lol. He sucks at editting lines since he's not a writer.
Maybe "lips if you want. Some cultures do that" line is editted as well, and so is Rick going back to the coach with saying "You are my little buddy" part. And I don't think he actually stepped back like that. He must have done horrible things to his grandson.
And why he did that? Maybe he got turned on how he sat on the coach lol. Just look at how he spreads his legs widely. So cute, isn't he?
After Rick pushed the red button, Morty takes him to Rick's bed and says "If you really want to forget those memories... I will be a good boy tonight so you won't miss that world anymore"
The night DID feel good, except it caused guilt spike and led him to the another vacation lol
I believe Evil Morty and C-137 Rick had slept with each other.
They haven't had sex tho. They just laid down on the double bed, staring at each other with no words... and then Evil Morty kissed him on the lips. And Rick just stayed like that. EM even took off his eyepatch to see him more clearly, and called him "my grandpa" in a possessive tone. EM continued groping him for few minutes and fell asleep. Rick couldn't.
Damn I really wish Rickorty x Lolita stuff had a more mainstream appeal. I fw this heavy lately and I hope I could see more of this PLEASEEEEEEEEEEEEEEEEEE
"Morty, light of my life, fire of my loins. My sin, my soul. Mor-ty: a two-beat journey, beginning in the shadowed hollow of the throat and ending with the tongue’s quick silver tap behind the teeth. Mor. Ty. He was Mo, plain Mo, in the morning, standing five feet three in one sock. He was Morticia in skirts. He was Mortimer Chauncey Smith on the dotted line. But in my arms he was always Morty."
Idk if Rick Prime is going back to life in future season or not but I'd love to see him kidnapping Morty Prime and blackmailing C-137 Rick. It would be ironically funny since Morty Prime is HIS grandson lol
Idea: Literary!Morty (or Writer!Morty) writes books about his adventures with his Rick. Rick pretends he thinks Morty's writings are stupid, but he still reads them and says his opinion like: "27% of it is wrong" and "This part isn't scientifically accurate" lol
He pauses at some parts: "A scientist who lost everything", "A lonely, desolated man who believes he's divine", "The one who overcomes any threat across the multiverse but never his own emotional pain". He would say it's cringe, and then go to bed and spend all night reading his book (even drops tears several times)
Rick has slept with a ridiculous number of beings across the multiverse: women, men, aliens of every shape and gender configuration, hive minds(Unity) and even sentient planets... but he ends up getting his retirement from casual sex since he started to sleep with Morty, because no one else feels home nor satisfies him as much as Morty does.
He even tries to distract himself from indulging his grandson by having sex with other beings, but he always ends up getting back for feeling the warmth of Morty's body.