Disclaimer: I don't own Charmed. I wish I did because Cole, but meh. What can you do?
Phoebe pressed her head against the bathroom door, trying to block out Cole's pleas for her to open the door. Her thoughts were racing. She heard him move away from the door and moved to the sink. She gathered some water in her hands, splashing it on her face in hopes it would calm her down. A sudden crash made her stop, and move towards the door but not open it.
"Phoebe get out here and help us, dammit!" Piper shouted angrily. Phoebe ignored her, pressing her ear against the door so she could hear what Cole was saying. Phoebe heard Piper make him explode and let out another sob. She heard Paige fly against the wall and heard her husband beg them, "Don't make me kill you." Phoebe gasped, and "Phoebe, you heard what he said he's going to kill us!" Piper shouted. Why couldn't they let them be? He didn't want to kill them. Why couldn't they leave them alone? She curled a hand around her stomach and whispered, "Forgive me." Sobbing even as she wrenched the door open and made her choice.
Cole summoned a fire ball, ready to kill the two women that had made his life hell, when he heard a small sob from behind him. Turning, he saw his beautiful pregnant wife with the last crystal in her hand. "I'm sorry." He said, and he was for the pain she was in and the turmoil she felt because of her sisters, "But," he continued, "it's for the best."
Phoebe walked towards him, shaky and pale. "I know it is." She said back and reached up to kiss him. He extinguished the fire and pulled her closer to him, her sister's looking at them in disbelief. She turned to them, holding her hand in his. "I'm sorry, too." And handed him the crystal. He smiled at her and let go of her hand to summon another fireball, banishing the crystal so he could wrap an arm around her. "I really am sorry." Cole said one last time, placing a kiss on Phoebe's head as she hid her face in his shirt before throwing the fireball at her sisters and the Whitelighter.
There was an explosion and then they were gone, their screams echoing in Phoebe's ears. No doubt Leo was still alive, but her sisters…Phoebe let out another sob and wrapped her arms tighter around Cole. Her sisters were gone, and hell was sure to follow, but she had her husband and her baby and that was enough for Phoebe.