Jealous 11 year old

So my step son who I love as if he were my own...told us tonight at our gender reveal party that he didn’t want another stupid baby. His mom just had a baby 4 months ago. We have a 1 year old and I am currently 10 weeks pregnant. It’s so bad that he threatened suicide 4 months ago (before we were pregnant again) bc he’s jealous of the babies. We already enrolled him in counseling but he feels like he can say or do whatever he wants now. His mother is babying him beyond belief. He fake cries at the drop of a hat any time he wants something and is told no. He has admitted that he was not suicidial..he just wanted attention. Does anyone have any suggestions to help us? Counseling doesn’t seem to be helping.