I mean it could be magic, but she also looks way more like one of her dad's, so it can be that he is her bio dad, and he could have once been married to a cis women, divorced and remaried, or maybe higher a surugate, or maybe one of the dads is trans.
"Before I get into this video: remember to Like and Subscribe!" Sorry, but I don't Like anything that I haven't watched. d: (But I _am_ already Subscribed. So.)