What age can a brother and sister share a room until in North Carolina...
I have a step son who is 4 years old... however me and my husband now have a 2 1/2 month old little girl, she was sleeping in our bedroom in her bassinet but now she needs to be in her crib, however we have a two bedroom house right now and we were going to put her in the room with her brother but his mom said she would call the state on us... can she do that or are we OK to let them share a room

There is nothing wrong with that as long as the 4 yr old doesn't harm the 2 yr old.

Tell her to pound sand! Remind her that CPS is for abuse and neglect! Siblings sleeping in the same room - sometimes the same bed - has been going on since there were brothers and sisters. It is a part of bonding. It sounds to me that she is afraid that her son will bond with your daughter. Petty. Fact: He's your daughters big brother. Fact: she's her son's little sister.
Teach your children - and her's - to respect each other at a young age and they will grow up to be a family.
Big brothers are great - I have two - they can stink sometimes - but they're great.
Good luck.

Oh, one more thing.. . You'll know when it's time for the boy to have his own room - or share with another boy - They will let you know - probably pretty loudly.
Trust your instints.

There are very few laws that deal with this. Most of them deal only subsidized housing or foster care.

Tell his mom, that if she wants buy you a larger house or expand your existing one she is welcome to. But there is nothing wrong with siblings that young sharing a room.

Let the mom call and maybe cps would get a good laugh. It sounds like she just wants to start trouble but as mention already there's nothing wrong with what your doing.

There is no problem with the age difference and gender for now...

But I wouldn't think itd be good for the 4 yr old to wake up from the baby crying each night...

CPS most likely will do nothing, but of course this type of mother will keep calling them even if she has to make it up most likely.

She needs to go to some counseling on how to deal with divorce and its effect on children.