You have to speak about this with your parents. You can’t stay silent because this can happen again. And they might do this to any other boy too. If you want to file a case against them then you need to find any evidence to prove your statement. Or you can find an eye witness of this event. Then only you can file a case under sexual harassment. You also have to be mentally prepared to explain this event in details. Try to make up your mind first before going through all the legal processes.