You say Joan Collins once had an affair with Arthur Lowe? I find this highly implausible. https://microblog.mjd.id.au/url/24427

But if it did happen I can imagine how word got out:

"Why Mr. Lowe, what an enchanting young lady you have on your arm this evening! Pardon me, madame, but your name is…?"

"Don't tell him, Collins!"