Can you recommend some shotgun marriage novels?

The male protagonist likes the female protagonist, but the female protagonist is the girlfriend of the male protagonist's younger brother. In the villa, the male protagonist and the female protagonist have a one-night stand, have a baby, and finally get married. In the finale, the two of them are together. The male protagonist and the female protagonist seemed to fall in love at first sight, but the female protagonist was already the girlfriend of the male protagonist's younger brother. Once, the female protagonist and the male protagonist's younger brother went to the male protagonist's villa to play. Coincidentally, the male protagonist was sick and needed to recuperate. The female protagonist was drunk and went to look for the male protagonist's younger brother in a daze. However, she entered the wrong room and had a one-night stand with the male protagonist. After that, the male protagonist's younger brother forgave the female protagonist, but the female protagonist became pregnant and had no choice but to marry the male protagonist. They lived together and the female protagonist gradually fell in love with the male protagonist. When they were in the villa, the male protagonist's brother's friend went to the kitchen and put an aphrodisiac in the wine glass. After the incident, they all thought that the male protagonist drank the aphrodisiac to get together with the female protagonist. However, what they did not know was that the male protagonist did not drink it at that time. He poured the aphrodisiac out. When the female protagonist went to look for the male protagonist's brother, the male protagonist was sober, but the male protagonist had selfish motives. Who can tell me the title of the book