I (16M) told my (16M) uncle’s (Dead 74M) Son (49M) that he (49M) is a bigger (more big) donkey

So Here’s the story

My (16M) uncle’s (Dead 74M) Son (49M) visited us with my (16M) uncle’s (Dead 74M) son’s (49M) son (21M), I (16M) went to pour them (My (16M) uncle’s (Dead 74M) Son (49M) and my (16M) uncle’s (Dead 74M) son’s (49M) son (21M)) some water (hydrogen bound between two Hydrogen molecules and one oxygen molecule)

I (16M) was about to pour water to my (16M) uncle’s (dead 74M) son (49M) because he’s older than his (49M) son (21M) (49 – 21 = 28 years difference), But he (49M) said to me (16M) give that donkey (21M) first, I (16M) told him (49M) “but you’re bigger (more big) (donkey)”