Keeping the kink a secret from my partner
I (30F) have been drawn to mommydom for a while now. I've experimented with it online and only plan to keep it online. However, my partner (31M) is completely monogamous and absolutely will not accept it if I were to tell him of my doings. He's a dom himself and I appreciate being his sub. He and I have a great, stable, loving relationship that I do not want to lose. However, I feel that if I don't express this aspect of myself as a mommydom in some way, it would be rather toxic for me to deny as a part of myself, hence why I find littles online to anonymously express this in a healthy way.
My questions are:
Does refusal to express this kink to my lover make me a "bad" person?
Is this considered cheating (emotional cheating)?
Are there other mommies in this predicament? If so, how do you go about your dwellings within the kink?