Why do you want to flower it first?

Your only going to stress the plant out.

The better options with less stress are

Keep the mum until she reaches sexual maturity and will show sex during veg, then take as many clones as you can. The bigger the plant is the more clones you will get.

Take clones now and leave the plants in veg, number the clones to the relevant plants and when the parents show sex kill the male plants and clones.