Lisa knew that Oscar had an incalculable amount of money in 2 days. 7 derivatives, if people say. And Lisa knows very well that the man likes to spend on the people he cares about, like she and William.
Lisa also couldn't stop Oscar from buying her expensive things. For her, it's Oscar's money and the man has the right to use them as he pleases. Like spending it on expensive things and buying a blazer that always looks the same for himself.
Lisa too, couldn't bear it if she didn't wear the clothes or things that Oscar bought for her.
But unfortunately, no one except Vira knows that Lisa is in a romantic relationship with Oscar. All they know is that Lisa is an ordinary woman who works as the head of the Finance Division. Supposedly, with her salary that isn't earning much, she can not buy expensive things, unless she is born a rich woman.