I Have a Bit of a Problem, My Sim Parents Won't Care For Their Infant

I generally cheat needs, as someone else said above - and if you use the mccc mod you can add a happy buff, then change the emotion intensity to very happy, it's super effective at keeping babies and kids in a good mood, and less needy. And if all else fails I use cas.fulleditmode and age up the kid lol. I've had parents like that too. It can be super frustrating.