She went to take a shower but opened the curtain and your uncle was already in there. Now there's extra glances toward him and she's being extra nervous when he's around.

What do

Suck his dik to assert dominance

Eiffel tower

I guess for once it's a good thing my uncle only likes young boy's buttholes, a less on I learned the hard way when I was 8.

the look in her eye, you just KNOW they banged
OPs unclce is known to be THE most hung guy in the family, possibly one of the biggest in the world. his cock has been described as "like an evian bottle", with gargantual thickness that would rival shane diesel and shorty mac. im estimating his size to be at least 8.5" bone pressed, with OVER 7" of girth. he would have absolutely destroyed OPs fiancees pussy.
they would have spent hours and hours on foreplay, getting herself wet enough just so she can take it. i can just imagine her begging for it, with his uncle barely able to force it past the knob, and his fiancee moaning and squirming, demanding him to force it in deeper. she would have orgasm'd within seconds of taking the entire length, being filled and stretched right up to her cervix.. the orgasm would have been powerful, with her vaginal muscles clamping down on his uncles throbbing monstrosity, her whole body quivering in euphoria..
i bet she still masturbates to the memory of it