It takes effect but slow at first

Helga finished her meal and then started breathing heavily. She was started to sweat and feel her heart beat increase. "Excuse me, servant. I need to......lay down for a second. Clean up here." She said as she went to her bedroom and shut the door.

Kazex smiled knowing that the potion was starting to affect. Once he cleaned up, he then quietly went up to her door and listened in through the keyhole. He could hear her moaning and her voice changing. He was sure she was slowly transforming. He knew that once she was fully turned, she would need a goblin dick to breed her as female goblins are natural sluts.