Can child services take my son away?

Appears that my sons great grandmother has a visitor that talks to her often. She has a big mouth and is the town gossip.. Well he asked why my son is never outside playing. She told him it's because we don't let him out of the house and it's basically abuse. We'll he starts going on about how he has a sister in DHS and he can report it for her if she wants. So now I'm terrified I'm going to have an open case about child abuse towards my son. That's definitely not something I even want investigated and on a record because she makes up crap because she's lonely and trying to be interesting.

He's just turned 2. Its Missouri winter. We just had 18 inches of snow a few days ago for example. We live in the rual area so there are no fences, just houses and our house is on a hill so basically if you fall, you roll like 40 ft into the street. I take him with me everywhere. Store, food , park... Where ever I go, he goes.

I'm really pissed but I need some advice on what to expect from this or what's even going on.