Am I a bitch for being like this?...

So I'm 37+4 pregnant with my first baby. My younger brother doesn't bother messaging me or asking how I am ever... I saw him briefly the other day and all he wants is money or something needy. So I've cut this short but my brother is all for himself and I've tried tolerating it but it just pisses me off how he always needs or wants something and always to suit him and I'm just too pregnant and can't be asked. Yes he's only 20 but I'm 23! I'm not massively older. He doesn't bother with our mum or dad and had been ghosting them since January for no reason and it breaks their heart. He's had an argument with his girlfriend and wants to come to mine to chill and I feel he will never leave and he's weasle his way in and I'm about to have my own son not worry about my brother who's a grown man! Am I a cruel bitch of a sister? Or fair enough I've lost patience? Just lying here feeling like a bad sister...