Who else is in a better position to take responsibility and care, than you (& partner)?
How else could you do it if not with love?
Your partner + you: 20% off is 1+1 days a week. Make grandparents happy, that makes +1+1 days. Each of you can take 2 days off a month. And this is even without parental leave for three years.
After that, daycare is your answer: socializing is an essential need for humans.
You. The way you made her. The Famous 20% time?