With small age gaps, your body just doesn't spring back. It can't. You may be in the fitness industry, but that doesn't mean your body hasn't been pulled out of all proportion twice in the last three years - it takes time to go back to how it was. It is not going to happen in under a month: it is not going to happen in under two months. It may happen by three if you push it, but do you really need to push it?

I'd love a fitness instructor that wasn't a stick insect. Someone who was fit and was in normal sized clothes? Someone fit and had a post-baby body? I'd sign up for that class.