Having Cubs to Extend My Life, I Ended Up with a Whole Litter of Fuzzballs

The world of beasts + the life-sustaining system of having children + strong women and strong men + heartthrobs + more males than females + upgrade [The heroine is a scumbag, a little reserved, but not much. Good news: Ruan Xiyue has traveled through time. Bad news: only three days to live. Good news: Being in a romantic relationship increases your lifespan. Bad news: The original fiancé dislikes her and wants to break off the engagement. Okay, okay, let's do this, right? Her ex-fiancé laughed at her for breaking off the engagement, so she could only foolishly choose to marry a beast husband who had no hope of offspring. Later, she watched her beast husband's children running around on the ground, leaving her with greedy tears. Meeting a savior: If you want to save a life, you can only give your life in return. If four lives are not enough for you, it is not impossible to add more. This Haoyue Rabbit who likes to play innocent: Don't you really have a twin brother? It turns out he has a dual personality, so that's okay... What the hell! Isn't it only by having babies that you can live longer? Continue! She wants to fill it up!