I call them “ama” and “agong”.
My husband’s parents are divorced so I call them differently depending on how close I am to them.
I call my mother in law “mom” but since I’m not use to it, most of the time I refer my mother in law as “your mom” to my husband. 
As for my father in law I just call him by his first name.
Me too!!!
and that’s because I want my child to call them that, when he is old enough to do it - by himself
I would call them whatever they say to call them. I don’t mind mom and dad if they ask. Or Mom Lucy and Dad Peter if they ask. Or even by their first names, though I prefer not to. If they say I can call them whatever I’ll prolly go with mom and dad. But definitely not Mr and Mrs Goldsteinberg after marriage.
I would hope my spouse addresses my parents “Mom/Ma” and “Dad/Ba,” their first names, or just something all three of them agree to. But “Hey, dinner was great,” or “I’ll pick you up at the store, b[/b]” or “I really like the color you chose for the bedroom, guys” does not sit well with me. They’re my parents, not “hey” or “yo” or “guys” or “wei” or “b[/b].”
A poster mentioned s/he doesn’t even address his in-laws with a title. Actually, I’ve heard quite a few people do that. I think that’s pretty amusing, but disrespectful. Isn’t the “What should I call your parents after we get married?” topic one of the first things you talk about when you marry?
I’m not married, and got the Family name+Mama/Baba formula.
While it is somewhat drawing a line in and out of the family (not that great for me ), it doesn’t make me any uncomfortable calling them mama/baba as i just feel i am addressing to the head of THEIR family.
However, they can certainly expect me to think it over and over when it will come to integrate THEM in MY family.
They are lovely when it comes to me, much more problematic when it comes to us. I can’t even hate them as they are really nice, but god they can be pain in the ass when it comes to my couple.