Good Cop, Bad Cop

This movie I swear is my fiance and I. I feel like I need things in order and planned like Drew Barrymore. When traveling I am the one scared of it all. He loves to play pranks on me when we are traveling. He has gone too far as to make it seem like he went off the side of cruise ship! 

He and I love cruising and once when we went he thought it would be great to hide behind the spot you can't see on the balcony. I am that weirdo that has fears of being sucked off the side of the ship. Yes, I know that cannot happen, but it is my odd fear. 

Well back to the whole blended thing. Fear is something that I have when trying to deal with being blended. The dreadful, am I stepping on toes, and am I that evil stepparent that we all love to say things about when you are a kid.  I often question many things that I say and do. 

When dealing with certain situations I feel like the bad cop while my fiance is the good cop. I take away things and say absolutely not! Am I wrong for that?! I know discipline should be given by the actual parent, but sometimes the stepparent needs to step in. I do not want to raise, bad kids. 

So, the question is should the child only be disciplined by the one parent or do you think both? I know this might be a sensitive question for some.