My Sugar Boy: A Billionaire?!

Vivian Sterling was put out of her family. She looks like her half-sister, and she took the sister's place with two men in business, running both arrangements at the same time, with neither man knowing about the other or about the substitution. She used the money from both to keep Adrian Lane, a young man with nothing of his own. The rest she was putting aside to leave. Word came that the half-sister was returning, then a message from Adrian Lane. Vivian broke contact with both men, walked out of both arrangements, and went to Seabrook. The two men followed her there and so did Adrian, whose own family turns out to be moneyed, with him the heir to it.