The two guys your sister got are both losers and your sister makes really bad choices. So I’d not use your sister as an any kind of role model or example of anything. Getting two guys isn’t an accomplishment or achievement. It’s not like she got advanced degree.

Losing one’s mom could be very hard no matter of your age or life situations. I am sorry it saddens you. But you can’t predict the future. So it’s better to live in the present