You seem to still be walking on eggshells around you wife and she senses it. You can't decide on what to do because it appears you don't want to upset her and yet she gets upset anyway.
Start leading let her know what the plan is. "I am going to pickup Chinese on the way home for dinner. What would you like? Then I am heading to the grocery, is there anything you need? I can imagine you don't feel well after your dentist visit today. How can I help you?" Now if she needs or wants something it's up to her to bring it up. You were thoughtful of her and a man with a plan.
"What is best for my kids is best for me" Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712