If you forced someone to sin, you need to make double repentance. You should also ask forgiveness of those you harmed in this way. Furthermore, even as you encouraged them to sin, you should now encourage them to repent and make amends.

 

As for the details on repentance, please refer to the detailed answer linked below:

 

http://aboutislam.net/shariah/refine-your-heart/advice/door-repentance-wide-open/

 

Allah Almighty knows best.