Dead as a Dodo by Hailey Edwards

Ellie has done her best to keep the spark alive in her marriage to Wally, but she has limited options with her husband cursed into the body of a vintage novelty toy. She thought everything was going okay, aside from the fact he’s battery-operated and bursts into song whenever his motion sensor is triggered, but he’s done being a collector’s item.
When the Middles turn up with a half-dead coworker on her doorstep, Ellie jumps at the chance to help her nephews find who’s responsible to avoid the problems at home. As the attacks grow deadlier, and the rift between her and Wally grows wider, Ellie has to focus on saving herself if she ever hopes to save her marriage.