The Highest Bidder (1921)

Society miss Sally Raeburn is left penniless and is helped out by an older woman The woman makes it clear that to repay her Sally must marry wealth so when the very wellheeled Lester comes to her village Sally goes after him Lester has been traveling incognito in the hopes that no one will discover him so when Sally wins him she feels guilty and confesses that she knew who he was all along