pander

A person who furthers the illicit love-affairs of others; a pimp or procurer.

[…] if ever you prove false one, to another since I have taken such paine to bring you together let all pittifull goers betweene be cald to the worlds end after my name, call them all Panders, let all constant men be Troylusses all false woemen Cressids, and all brokers betweene panders

It was not only the brilliant phalanx of virtuous dowagers, generals and academicians with whom he was most intimately associated that Swann so cynically compelled to serve him as panders.

An offer of illicit sex with a third party.

An illicit or illegal offer, usually to tempt.

One who ministers to the evil designs and passions of another.

Camillo was his helpe in this, his Pandar: There is a Plot against my Life, my Crowne; All's true that is mistrusted: that false Villaine, Whom I employ'd, was pre-emplot'd

Those wicked panders to avarice and ambition.

To tempt with, to appeal or cater to (improper motivations, etc.); to assist in gratification.

His latest speech panders to the worst instincts of the electorate.

[...] both the Conservatives and Labour are guilty of pandering to the road lobby at the time of Beeching's The Reshaping of Britain's Railways report published in 1963.

To offer (something or someone) in order to tempt or appeal, especially to base or improper motivations.

Who knows what Brill really thought? But he pandered the rumor linking Spear to a whole string of dastardly deeds.

To offer illicit sex with a third party; to pimp.

To act as a pander for (somebody).