You've given your doll more attention than Alastor lately, so he became envious because of that

"Eeek! You're so adorable I could hug you forever!" you snuggled your plush tightly in your arms, while Alastor on the other hand gave it a death stare

"Pfft. Please, you're really choosing that piece of fabric over me?" His voice was pinched with annoyance as his ears were pinned back while he crossed his arms.