Not all FLRs look the same and in real life FLRs don’t often look like D/s fiction scenarios. If your wife handles all the finances, assigns you chores, and welcomes you pamering her, then that looks like a real-life FLR (to me anyway). So if she doesn’t want to spank you, there’s no reason why she should. It’s all about what she wants!
But as a constructive suggestion, if you havent made a formal agreement defining your FLR, it might be a good idea. You both can review the rules on a periodic schedule and that would be a good time to discuss any correction or discipline.