Yes, I think it would nice to just let her do things on her own pace. She just delivered a baby and she may still be physically fatigued, as labor and delivery really wear a woman out. She is also probably adjusting to her new situation, as it is really overwhelming for us, so just try and understand her now.

Yes, her breasts will eventually get used to the feedings and may be less sore in the long run. After feedings, she may express a little amount of milk and spread it in the nipple area and air dry it. This can help prevent sore nipples.

When you have time, prepare or buy healthy meals for her (fruits and green leafy vegetables, veggie soup). That way, you get to convince her secretly to shift into a healthier diet for her milk supply and for your son.

Just be a supportive husband and I know that you and your family are going to be just fine. I hope this helps! Congrats on your new baby! :)