Idk..

I got with my boyfriend a few months before my LO was born, a year later my LO starts talking and associating words with people and things and starts calling my bf Dada(without being told to call him that). He loves my LO like his own and that's the only real father figure my LO has had in their life, the "father" has only seen the child for maybe 8 or 9 hours in almost a year. My question is do I let my LO call my bf Dada or should I correct them?