First of all congratulation, a metis kid is the most beautiful and often an intelligent little thing 😉
But unfortunately there are to many girls who do anything to get out of poverty and seek to leave the country. Not saying she is lying, but as you already have said you need to be sure. I don’t know how you can get a DNA test here, but if you are fertile then the question is do you want to know?
Do you care about the girl, then maybe why not go with the flow.
You are planning to come back to verify and clarify then, I am married with a Malagasy, 2 kids, and we live in Madagascar so if you need some help, maybe more useful some advice then feel free to contact me. The cultural difference between Madagascar and ‘our’ way of approaching life is rather big on the little things. In a situation like this maybe it be nice to have someone, like me, to turn questions before hesitating to a conclusion.
Kind regards
Mikkel