How do you feel about children calling their parent's boyfriends/girlfriends or spouses 'mom' or 'dad'?

T🌸

I posted this in Health and Lifestyle as well but I feel like it's controversial amongst a lot of parents.

How do you feel about it? Are there specific situations in which you'd be okay with it for your child? Would you ever be okay with it or do you not care at all, to the point that it wouldn't bother you either way? And, to add to your answer and perspective, are you a parent or have you ever dealt with this yourself?

I'd like to think I'd be okay with it, my very-pregnant hormones have me feeling otherwise but until now I have been, so let's just say I am 😂 But I'd only be okay with it and with my now-husband's theoretical future girlfriend or spouse calling herself my child's mother if she does motherly things for her (taking care of her while my husband is gone- sharing parent duties), if she's good to my child, respects my husband's and my parenting choices/decisions, and isn't likely to be out of the picture anytime soon (only because I don't want my child to be hurt). It would be important to me if my husband and I ever split, that we co-parent well, so I feel like this would be a situation we would come across when we met other people. The same stipulations would apply for my own theoretical future boyfriend/spouse, I would require the same things for him to call himself my child's father and for me to be okay with my child calling him dad.