大きな黒いおっぱいを見せるセクシーなおばさん

I think the two are very connected. Savita Bhabhi is a huge hit because she is also the bhabhi at home. If you've read the comics, you'll know that she's a loving wife and an attentive daughter-in-law, while ALSO being a super sexual woman who goes after what she wants. But yes of course, what you're talking about is incredibly true, because this is the exact dichotomy that binds women.