"*ahem* test, test..." First 'test' should be capitalized.
"Like all Morty's she is unspoiled!" No apostrophe.
It goes too fast to get a picture, but while Sleazy Morty is talking and the view is of our Morty face-on, when he blinks you can still see the iris and even a white spot that appears on the right side of the eye. Doesn't matter which way he's looking. The iris reflects his current viewpoint through his eyelids.
"All of em are fapping..." Can add an apostrophe at the front of 'em' or change it to 'them'.
"...Rick popping a zit from his ass!" Change 'from' to 'on'.
"Hey it's big dick Morty!" I believe a comma should appear after 'Hey' and 'big dick' should be capitalized as they're using it as a name. This was done a bit before by Sleazy Morty.
"If it weren't for Rick I probably never have found you." Needs a 'would' before 'never'.
"Well, well, well, if it isn't Morty, I thought you..." Feels to me that a period should replace that comma after 'Morty'.
"...if there is pizza it's italian and fancy." 'Italian' should be capitalized.
"...anything about my sexlife." Space between 'sex' and 'life'.
"*sulp* Yeah?" Think you meant '*gulp*'.
"I feel like a fantasy..." Usually this is said as "It feels like".
"I guess that I don't really have a choice here" Needs a period.
"Yeah... maybe don't say things like that" Another period needed.
"I should be weirded out but that..." I'm guessing you wanted 'by' instead of 'but'.
"R-really? Cuze it feels like... Should be 'Cuz' with an apostrophe at the front to replace the missing letters.
"I know you like me better that way" Needs a period and 'that' should be 'this' as they're talking about it now.
"Yes! He totally just came just from watching me." The second 'just' should be removed.
"...you spying on us?!" Should be 'you're'.
"...and pretend it's ice-cream." 'Ice cream' doesn't need a hyphen. There is a place for it, but not by itself.
"Tricia's eyes roll back and squeezes Summer's head..." Should make it 'she squeezes' because right now it sounds like her eyes have legs and are squeezing Summer's head.
"...covered in my wet juice." 'Wet juice' is a weird term, could just say 'juices'.