"It was a nice sundown party and we had gone there for a date. We didn't know it was a rave party," Shilpa told reporters here Monday.
The couple was caught in the raid late Sunday night at Oakwood Premier Hotel in Juhu along with nearly 100 others, including IPL players Rahul Sharma and Wayne Parnell.
"We were hardly there for 25 minutes and were sitting outside. There were journalists and scientists as well. We saw cops had come to the hotel and we were sent for medical examination," she added.
The actress, who was seen as Ganga in "Kyunki Saas Bhi Kabhi Bahu Thi", says they hardly ever party.
"It was after a long time that we had gone out together. And this is what happened. How are we supposed to differentiate which party is safe and which unsafe," she said.
The couple was taken to a government hospital to take their blood sample, but she was upset with the way the procedure took place.
"The cops were very supportive but what hurt me the most was that the hospital staff was not supportive at all. My blood sample were taken but wasn't labelled for almost 45 minutes.
"I requested them to do so as I didn't want my blood sample to be swapped, but they were very rude. I told them if the labelling is not done properly, the results can put us in grave trouble," she added.
However, Shilpa is sure that they will come out clean.
"There is no way my test can be positive," she said.