At least is was just you there. My friend's 4 year old dropped the F bomb in front of her grandparents. She called me horrified and all I could do was laugh.
One of my daughters, who are 18 months by the way, was saying good night tonight and my friend was over. She looked at her and said, "night night, fvcker". I have never laughed harder, by the way, my friend's name is Catherine so I have no clue how fvker sounds the same. Now I just have to wait for her to say it to her Grandma.