The consequences are far - reaching. Socially, you may face ostracism as this is seen as a taboo behavior. Emotionally, there will be a lot of guilt and shame involved. Also, it can lead to family disputes. The friend's family may be torn apart by this situation, and there could be a long - lasting negative impact on all parties involved.
Well, first off, it will almost surely end the friendship. The friend will feel violated and betrayed. Then there are the family implications. There could be arguments and estrangement within the family. And from a personal perspective, you may struggle with self - worth and moral conflict. You might constantly question your own actions and feel a great deal of remorse for getting involved in such a situation that goes against so many social and moral norms.
One consequence could be the loss of the friendship. The friend will likely be extremely hurt and angry when they find out. Another consequence might be a damaged reputation. People might view you as untrustworthy or immoral.