My partners re grouting the bathroom around the shower. I didn't realise how bag grout dust was. My partner was working upstairs and I noticed the dust in the hallway downstairs. We have two 4 month old babies that were downstairs in the front room with the door open until I realised. I've now closed the door and opened the window in the room they're in. They're not coughing or anything yet. Am I over worrying or could they get poorly?