Cuckolding??

So my fiancé has been into cuckolding since we first started dating. At first I was very very against it, I despise cheating, but I told him maybe one day I'd open up to it. Well I'm starting to slowly open up to it and I'm not sure if I should, I'm very against cheating even if I have permission, and he's never been cucked before so how do I know this won't end bad?? I'm pregnant rn with my fiancés baby (obviously, I'm extremely faithful)

And we talked about it again literally 10 minutes ago. We said that maybe a while after the baby is born we could try it out but now that I'm thinking about it I don't even know anymore. Maybe I was just open to it because I was horny?? Idk

Anyone have experience with cuckolding?? Any help/advice is appreciated!!