One of the main consequences is the loss of your best friend. No one would be okay with their friend having sex with their partner. Your friendship will likely be broken. Also, it can create a lot of drama in your social circle. People will take sides, and there will be a lot of gossip.
If she gets jealous when you talk about your time with your boyfriend or if she tries to undermine your relationship in some way. For example, she might say things like 'He doesn't seem that into you' or 'You two are so different, it won't last'. These are all red flags that she might have an ulterior motive regarding your boyfriend.
Well, first of all, communication is key. If you suspect something between your best friend and your boyfriend, have an honest talk with both of them. Maybe it's just a misunderstanding. For example, I once thought my best friend and my boyfriend were getting too close because they always texted. But when I talked to them, I found out they were just discussing a surprise for me.
These kinds of stories often involve complex ethical issues. In most cases, having a sexual relationship with your best friend's boyfriend is clearly unethical. It betrays the trust of your friend and can cause great harm to the friendship. However, in some fictional stories where there are special circumstances like the best friend was already in a bad relationship and had given some form of consent, it still makes for a morally gray area.
My best friend's boyfriend was an artist. He often painted portraits of her. Once, for her birthday, he organized an exhibition in a small local gallery with all the paintings he had made of her. It was a really sweet gesture. Many people came to see the exhibition and my best friend was over the moon. This not only showed his love for her but also made her feel special in the eyes of the public.
One story is that they were best friends since childhood. They knew everything about each other. One day, the guy realized he couldn't imagine his life without her. So he took her to their favorite park and just blurted out his feelings. She was surprised but happy as she had been secretly in love too.
It's highly unethical. In any normal social and moral framework, the idea of sexual involvement with a best friend's partner is unacceptable. Fanfic should also uphold some basic moral values, and this kind of theme goes against the principles of respect and integrity in relationships. It can cause real - life harm to the people involved, not just in terms of feelings but also in terms of reputation.
One story could be that a girl's best friend was really into art. Her boyfriend, who was initially not interested, started going to art galleries with the best friend because he saw how much it meant to her. Eventually, he developed his own love for art and they all bonded over it even more.
First, communicate your feelings to your best friend. Let her know that it makes you uncomfortable. For example, say something like 'I'm not okay with you still being friends with my ex'. Second, set boundaries. Maybe ask her not to talk about your ex in front of you. I did this with my best friend, and it worked out okay in the end. Third, try to focus on your own life and new relationships. Don't let this situation consume you.
Sharing a boyfriend socially with a best friend can be a tricky thing. In some cases, it might work out fine if all parties are very mature and respectful of boundaries. But more often than not, it causes problems. The best friend might start to compare her own relationships to what she sees between the gf and the boyfriend, which can create envy. And the boyfriend might start to feel torn between the two relationships. It's important to have clear communication from the start about what is acceptable and not in such a situation.