This is a true sequence of events. I am helping someone (Person X) to ask for advice. Please don't be nasty.
Assume the following:
1. X's father had a mistress for years. X's mother and younger brother doesn't know. But X found out many years ago and confronted his dad.
2. X's father apologised to X for his indiscretion. He requested that X kept this secondary family (comprising of X father's mistress and younger halfsister) a secret.
3. X father's mistress and halfsister also do not know that X has knowledge of X's father secondary family (up to this day).
4. Before his father's demise, X was tasked by his bedridden father to secretly transfer assets and money to the father's mistress. X did as instructed. X's father was worried that his secondary family would be caught out by lack of living expenses (post his death) and also the funds for the education of his daughter (X's half sister).
5. X's father also wanted a man he could trust to look after his secondary family post his demise, so that in times of need, his mistress or daughter would have a reliable man to help out.
After discussing with X, X's father entrusted X with the "guardian angel" role,.
X's father introduced X to his mistress and daughter. He told them.that X is his trusted young and able employee (instead of his real son) from his businesses.
6. X's father finally passed on.
7. Over the years, X frequently checked on his halfsister who was then studying in UK. He would even travel over to London to ensure that his halfsister's financial, housing and safety needs were.well taken care of. After all, she's his younger sister.
8. X's halfsister finally graduated and now back in Singapore. X would frequently meet up with her to ensure that everything is ok in her early career and life.
9. As time passed, X sort of became physically and intellectually attracted to his halfsister (who has now matured into a beautiful and sexy lady in her upper mid 20s).
This is especially so after X broke off with his current girlfriend. At times, X would get a hard-on (at home) because he had gone for an outing with his halfsister in the gym, shopping or for a swim at the club. The delightfully sexy image of his halfsister (sometimes in overalls) became evilly engraved in his naughty thoughts. He masturbated, but after his "release", he would always be in extreme guilt.
10. At the present moment, X sort of feels that his halfsister also likes him in the BGR sense. However, X is in a dilemma. His halfsister doesn't know he's her halfbrother.
Legally, it would be against the law for them to be married?
(Any lawyers can confirm?)
X would sometimes drive all the way to Mandai Columbarium. He would reprimand and blame (sometimes even verbally use the words "fxxking idiot" on) his deceased dad, for being an asshole and putting him in such a difficult dilemma.
Had his deceased dad stay faithful to X's mother, then none of this would happen right now. Isn't it?
Fxxking X's dad sowed the seeds, benefited the enjoyment of his dual women, and now X has to live and reap the shit.
Any good workable suggestions for X?
What should X do?
PS: Thread title and events edited to reflect the half sister as kindly pointed out by
@UltimaOnline