First, Mom's are normally in a hurry to get home. Yet, it's no secret that they may first have to stop at the grocery store. Yet, most larger grocery stores have deli's who target the same market you're after. You need to know. I bring home food more often than my wife does.
Many diners tout home-cooked meals.
To test if your soups and meals are well-liked, send out samples to be tested. Make arrangements to bring in a free dinner to the staff at a local office and stick around for feed back. Sure, everyone will say your food is good, but you know the difference between 'good' and 'ravin good'. If you decide to start your business, then this will be a good idea to use as a marketing tool. Now, the iffy part.