I too have felt that struggle, especially in my first 2 years as a SAHM. I finally decided that being a SAHM was my vocation, but that did not stop me from wanting a bit of income for spending money. I studied Proverbs 31 and realized that the ideal wife made a business out of her home based skills (particularly sewing). I love to craft and turned that into a sideline business. I am in total control of how much time is spent and when it is spent. This way I can still concentrate on my priorities. I attend about 5 Saturday craft fairs a year, have 2 open house weekends and am currently expanding into home parties, hosted by myself. I am still at home whenever needed, and still run a business too. I love being able to do both and totally see the fulfillment that the Proverbs 31 wife felt with running a small business from her home.
Maybe you too can be inspired by this.