ADVICE PLEASE:

So I’m currently seeing someone older than I . He has 5 kids ,ages 14 , 19,24,28,&29. I’m currently 6 months pregnant . We are having financial problems one car has been broke down for 6 months . He is in need of glasses health insurance and so on. So here is where I’m needing advice . Of course he pays child support for the two youngest and also gives them each money monthly . My problem is that the older ones ask for money every month and I’m not talking 40 I’m talking several hundred . They all have jobs. They can afford to go out to dinner movies party and even a cruise . But every month I need 200 for probation . I need 200$ for rent . I need 100$ for tickets . In one month one child revived more than 300. That does not include the several hundred to the others. We have not bought one item for our baby . We are behind on bills . Yes he pays all the bills and takes care of me and my son. It’s driving a wedge between us . I’m not saying he shouldn’t help his kids . I’m saying we can’t pay for there mistakes . If they have money to go to dinner and movies and party it up while we sit at home struggling to pay bills on time . I don’t think it’s right. ADVICE: am I wrong ? How do approach this?