I'm thinking of ordering a triple bunk bed for my step kids
That sounds expensive! Why do you need a triple bunk bed?
I want to make them spend more time with their siblings.
While that's a very comfortable and exciting thing for your stepkids, do you think it's really the right thing to buy? You need to know if they all get along super well or else having all three of them in one room can be super uncomfortable.
I don't care. Family isn't about comfort.
It really is, though. Having a step-family is very stressful, and I think it's better to consult them as a whole if they want to be sleeping together like that. Wouldn't it be nice to let them all have a say in what makes them comfortable?