While the title says "sister," variations of it also include mothers and other female relatives (such as cousins), and for girls this would most likely be "My is Off-Limits." This doesn't include daughters, because Overprotective Dad already covers that. This may also be a symptom of a character having a Big Brother Instinct. Also, this trope is almost indispensable for any Brother Sister Incest works, where it builds the initial Incest Subtext in story.
Contrast Best Friends-in-Law, where the guy is all too happy for his good friend to end up with his sister.
I talked to my sister and told her everything that was bothering me.
Instead of jumping to a rebound girl, I decided to get all of my anger out by going to the gym.
If a guy cannot tell his girlfriend how he feels because he is afraid she will blow up or break up with him and vice versa, then maybe a break up should have already happened.
Recommended Read: 11 Famous Bollywood And Television Couples Who Had An Arranged Marriage When everything you do provokes your man to lose his cool or create a ruckus, then it is time for you to re-evaluate your relationship.Jealousy in a romantic relationship can make a person feel more loved and special in the early stages.Most women, often take jealousy as a sign of re-affirmation of their man’s love for them. If the answer is yes, there is a chance that a dangerous relationship is right around the corner.Many people do not realize that they are spiraling down a never-ending relationship vortex.