Being fatter isn't something you can hide. That being said, if you don't want too much embarrassment, eat a bit less when family is around, and eat more when they aren't. Tight clothes likewise should be avoided with family. Get a size or two up if you can.

MinMaxing your money per calorie is important. Go for Burger King's 2 for 10: 2 Big Kings, 2 small fries, and 2 Fantas for $10 is the most calorie dense choice.

Also, as thighs rub and belly and breasts hang more and more, use a powder under those rolls. Any skin on skin will develop humidity.
Also tuck underwear under belly hang, if you don't already.

At a family gathering, when even your fattest family members say you need to lose weight. And the others tell you it's okay to get more to eat.
Also, approaching big round numbers, like 200 kilos.

Sounds to me like you just unlocked a new fetish.
If it wasn't already one.

-People let you use benches in limited seating situations, and move out of your way when you come near.
-You can feel your heaviness press down on things. Chairs don't fit, and creak, floors groan, cars jostle, and beds bend under your blubber.

Oh yeah, I also do this. I also belt my pants before they go on.

Consider: President Taft was considered a fat giant in his day. He was 6 feet even, 330 pounds maximum. I have 2 inches and almost a hundred pounds on him.
I think everybody's just getting bigger overall, so us fatties and fat lovers are forced to go bigger. Would you have considered a six hundred pound woman existing, had you not seen a 500 pound one?

I just meant in general, everyday use. I'm not gonna get banned for it, I know.

Now, as a guy with a very belly heavy, bottom light kind of shape, some brands have room in the front for belly storage, but most don't. In general, avoid straight or slim cuts, reach for relaxed fit, or better yet, elastic band relaxed fits. Aim for pants with a high "rise" (inches between belt and crotch seam) if such a thing is defined.
Now, in terms of fashion, I would avoid pleated legs. Low enough belly hang warps that line.
PS: is crotch a dirty word?