Pretty much this actually, if you want an open relationship you have to be honest about it form the beginning... you can't just decide thats what you want to do after you've been monogamous for a while.... bad formKatatori-kun said:Yeah, dump her and move on.
Polyamorous relationships need to be open and upfront from the beginning. One partner in the relationship suddenly wanting to be shared just says to me that they want out of the relationship but don't have the courage to say so.
Get rid of her and don't look back. Better to be on one's own than to be with someone who doesn't respect your feelings.