Baby‘s Father keeping pregnancy a secret

I have been in a exclusive relationship with my baby’s father since January after years of friendship. We are now five months pregnant. We both wanted this baby and conceived on purpose.

He participated in our maternity photo shoot, online pregnancy announcement on my social media and gender reveal. Our mutual friends all know we are expecting. The only problem is that he hasn’t told any of his friends and family or the mother of his other children. He keeps saying he’s waiting for the “right time!” I’m pretty concerned. Any thoughts?