If your salary can support the family's expenses, and you also support your wife to takecare the baby by herself, why need to concern about your mom's thinking? All the 99 in the world don't like their "sun po" stay at home as they think she must be lazy for not going out to work, but never think what she did at home. Not going to work doesn't mean not contribute to the family, it is another side to support the family.
I think you should support your wife, not just listen to what your mom said!
樓主,老公同我都覺得如果可以親自凑到佢大就最好,bb成長每個階段都好寶貴.我哋計劃最少凑到佢十零歲我先會返full time job.結緍後我都冇做嘢,咁耐都係佢養我哋,我就全職照顧佢哋,老公從無計較,放工都幫手做家務,朋友過嚟探我哋都覺得老公好開心,好滿足.奶奶一樣好似你媽咪咁叫新抱(我)出嚟做嘢(未結緍前我人工幾高),我公幫我頂晒,佢話而家我哋最重要嘅責任係親自湊大佢,有錢揾係好,但睇唔到佢成長每個階段,佢覺得唔值得.留係屋企湊bb唔係一件易事,你太太已經好叻,湊bb嘅壓力好大,無覺好瞓,其實我覺得俾返工仲辛苦同勞氣.樓主,好好坐低同老婆媽咪傾下,如果處理得好嘅話,佢哋係關都會無咁差,相信你會係一個好爸爸/老公.
You should tell more your condition first.......
For example,
How much you earn monthly?
Do you (and your wife) live in your parent's flat?
How much do you give to your parent monthly?
Should your parents provided meal for you?
If you are not live in your parent's flat, and you have already give your parents 'living expenses' monthly (say 3k or more), then you don't need to listen to your mother.
However, if you haven't give living expenses to your parents (not enough $), or live in your parent's flat (or eat at their flat), then you should listen to your mother. It is because you are depend on your parents now.