I woke up at around midnight to have a drink of water. Strange sounds came from the nanny's room. I peeked through the door crack and saw my husband entwined with her in bed. Anger consumed me. As I was about to shove the door open and confront them, I heard my husband say: "Has she been taking her meds lately?" His tone was icy, sending chills down my spine. "Rest assured. I make sure she takes the laced meds every day. She's incredibly weak right now and won't last long! Once she dies, what's hers will all be ours!" I covered my mouth in shock and took a step back, only to accidentally step on my son's toy. It made a loud click! There was a brief silence in the room, followed by a flurry of footsteps. The footsteps were approaching! What should I do?