My gf [25] has changed a lot and it makes me insecure

I always encouraged my gf to try cuckolding and try other men and she always used to say no or said that she would do it only for me and she herself does not like the idea of any other man.

But nowadays from past month she has been all ready to get fucked by a new man and she says she wants to explore her that side. She herself starts the convo about fucking other men and we also had a fight over it because i felt insecure to which she said she will do it nevertheless and said that i should not be insecure because it was me who always encouraged her. Now she says that for next 2 months she will avoid having sex with me and would look to explore other men and has explicitly said that i should not and can not stop her if i love her.

She has completely changed and taken a u turn and now i feel insecure about it