Sarah did not bring her towel with her

"Andy, are you there?" You heard someone calling for you faintly from the outside. You moved out of the door and it became more distinct.

"Andy, I need your help." You recognized this voice, it was Sarah. She left for the shower for quite sometime already. You went to the shower room.

"Sarah, is that you?" you said.

"Yeah, can you help me grab my towel? It's in my suitcase, I forgot to bring it with me."

"Yeah, sure, no problem. Give me a moment." You said.

You went back to the cabin and opened the suitcase. You found her pink towel easily, but you also found something else.