There are a number of ways mommy blogs bring in income. You can sell supplementary materials such as ebooks and use the blog to promote them. You can also sell handcrafted products or essential oils.
Your blog can host advertising which you will receive revenue for, or you can also host affiliate links, where you recommend a product and receive a commission from sales that are made from that link. Most importantly, you make money by providing quality, funny, and insightful content your readers want to see.