Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: " It was a once off remember , but that does nt mean that I wo nt remember it .... " and she turned and walked into the shower . I sat down on the sofa and slowly removed my pantyhose and then got dressed .

Question: what does it mean when I say It was a once off remember ?
It only happens once .
It was a single occurrence.