Slip of the toung

I picked up Dad and we took Evelyn and William to the JCC.  While we were there I asked dad of he wanted to go to lunch tomorrow.  We were talking about where to go and I mentioned Golden Dynasty which is a family favorite and said "Then if I bring the three of them (kids) William will be safe".  This greatly confused dad as he does not know about baby on the way and to be honest it is kind of an odd thing to say about a fetus anyway. And so he was like three? And I said " well I guess I am just jumping the gun then". I don't think he picked up on it though I will have to tell him soon.