Baby won’t age up | Sims 2

For some reason my baby in Sims 2 Super Collection won’t age up when I try to cheat it to age up because I don’t want the baby. I will round down the story to you. So, I was thinking about doing the BitLife controls my sims challenge in Sims 2 Super Collection on my Mac, I was playing it for a bit then my bitlife parents decided to have another baby and it was a boy. I tried them for a baby but it turned out to be a girl so then I aged it up and made it not apart of the family anymore and the cheats with the tombstone of L and D worked or Sims modder (part of the spawn in cheats). But I had to try again, so I tried again but this time it was twins and one was a boy so I needed the other one to age up so I could you know, move it out of the family. So, I tried cheating it aging up but it didn’t work for some reason and I got confused? I put a cake in my house and I aged up with the cake but the mum just stood there and didn’t age the baby up, so I tried again with cheats and it still didn’t work. I still have the baby in my family can anyone please help me and give me a solution of what I can do!! If you could that would be great!! 🙂