If you're pregnant and you're craving cake, go ahead and eat a slice (or two). Cake flour contains very little nutrients and often has added sugar, so please go easy on the cake if you have high blood sugar levels.
If you're not allergic to cake flour, it's okay to eat a slice or two of cake during your confinement period. Other than tasting delicious, cake make out of cake flour has very limited nutritional value.
Cake flour is mainly used for making cake, and while it's fine to indulge in a slice or two, there's very little nutritional benefit for you other than maybe a swift boost of energy.
Products made with cake flour are not suitable for babies under the age of 11 months.