Hua Jai Chocolate (2005)

In Hua Jai Chocolate we have a guy who's rich who doesn't know about love, He's been send to Switzerland to study Tourism & Hotel Management, he meets a girl who changes his life.

She gets pregnant (no rape) and keeps hidden from the guy.

In Wimarn Sai Main girls meets the main guy she mistakes him as a construction worker, she gives him money, helps him. They fall in love, but later on she discovers that he lied to her, But the same time the guy's brother is also in love with her.. Things got complicated

He gets jealous etc, she falls pregnant and keeps hidden from the guy

Both involves falling in love with rich spoiled men, getting pregnant and keeping it as a secret until the very end.

Pe is the only son of the real estate businessman, he has got childhood traumas, He has a crush on a married Lady who works as an interior designer, she is married to gay guy.
they fell in love, she gets pregnant, she keeps it as a secret until the very last minute.