should he put his siblings and parents first before his kid and girlfriend/baby momma?

I'm not sure what your asking but I'm having problems with my boyfriend on something like that & I put my foot down to let him know that we are having a kid and bills to pay & those come 1st !

no. when he makes his own family y'all should come first.

Once he becomes a father, his girlfriend/wife and kids should always come first and I'd hope his family would understand since I'm sure his dad put his mom and him first.