I Was Feeling Vulnerable

She had told me to kneel on the bed, head down and ass up. I was feeling very open and vulnerable in this position and I strained to hear what she might be up to. I saw the lube on the dresser and I tried to remember if it had been there this morning. I couldn't hear anything and I was thinking about what she had said.
"Stay just like that Kaaren and we'll be right back"
We? She had said "We'll be right back.". There was someone else here!
I was suddenly feeling more vulnerable than ever....