This is not something I would want, toddlers range in age from around 18 months to 2 years old clear up to a sim looking to be about 7 years old in the childhood stage.
Maybe if there was another life stage in-between the baby being tied to a bassinet to the toddlers life stage that was clearly younger, but as they are right now? ... yeah ... no, not for me.
I know that some people in RL do breastfeed well up to 3 years or older, but it always made me uncomfortable whenever a little one, who could clearly verbalize complete sentences and say "Mommy, I want to nurse" and then have the mom proceed to do it in public, not even in a private setting or covering herself (this was in the middle of a church service!)