A sweet bunny turned sour (plot idea/signups)

Part 1, Sweetness and love:
One day Bunnypaw is out patrolling by herself. She then sees Forbidden mate on the other side of the border. The two talk and they agree to meet each other again to train. Soon enough the meets become regular. Once Bunnypaw becomes a warrior she proposes to Forbidden mate and they accept. Overhearing from nearby Cat 1 comes up to Bunny once Forbidden mate is gone and asks her (or argues with her all depends) to stop meeting with Forbidden mate. Bunny refuses.

Part 2, The fruits begin to rot:
A gathering comes and Bunny comes to up Forbidden mate. She tells them shes expecting their kits. Forbidden mate dumps her saying she was just a phase and didn't want kits. Bunny is left heartbroken. The day after the gathering Cat 1 comes up to Bunny and tries comforting her. Angry, Bunny lashes out and attacks Cat 1, killing them. Bunny leaves the body by a stream and returns to camp, with no guilt over her actions.

Part 3: A sweet fruit turned so sour any trace of sweetness is gone:
Bunny has her kits and most of them are dead except for Surviving kit. Bunny blames Forbidden mate so she tracks them down while they are alone and kills Forbidden mate. Bunny yet again feels no guilt. Bunny then goes on with raising Surving kit. Cat 2 meanwhile is suspicious over the death of Cat 1 and later on Forbidden mate. Cat 2 was really close to Cat 1 and knows Bunny did too. So cat 2 goes up to Bunny and asks her did she know what happened to both cats. Bunny doesn't reply. Cat 2 asks again and Bunny reveals that she killed them. Shocked, Cat 2 runs back to camp. Bunny chases after them and kills Cat 2. Windclan sees this and they exile her. Even more angry Bunny attacks Random cat but random cat kills her. Meanwhile, Surving kit watches in horror. In the end Bunny is sent to the dark forest.