Logic says start over or go back to an earlier save and make choices that end with her not getting pregnant (no creampies is usually the simple 100% effective birth control method in AVNs). I mean in real life getting pregnant while still in middle or high school is kinda less than ideal so that aspect is at least realistic. From experience they are all probably calling her a slut, starting 1000 related false rumors, and talking shit behind her back at every opportunity. They'd probably really go feral if they found out her brother was the one that knocked her up.
Unfortunately, that's the case globally, as you say, and especially in "civilized" countries. In some "black holes," like India, and in extreme Islamist countries, it's not so much the case....
For the worse, in most cases, for the girl or woman