Sister

I was about to say I don't know, but Grace came up and said, "I'll be willing to help you but you have to do my home and housework."

I nodded and said, "That's a deal. Ivy, are you going to help me with the experiment?"

She was about to answer, but her phone went off and she had to it. I tried to ignore the yelling and screaming. Then she got off the phone and said, Sorry, mom just told me to get home. I'll see how it goes tomorrow."

I nodded as she headed upstairs, then I turned to Grace and said, "All right, first you need to strip off everything."

She looked shocked and said as she took off her jacket, "Pervert, you just want to see me naked.

I stammered thought my word, then when I saw her smiled, I realized that she was joking. I said as grabbed the clothes and necklace she was holding, "Ha Ha, very funny. What do you want to test out?"