that's fine. the potential issue is if your clones fail, then you are taking clones off a plant in bloom and those will re-vege and have lower sucess rate. the ones that live will be absolutely beastly growth of side branching, which you will have to thin out.
moms can be a pain in the ass, too. gotta take care of roots (avoid rootbond plant one way or another) or regenerate them occasionally.
always take more than you need...
don't let anyone tell you a clone of a clone is of lower quality. as long as you take a healthy cutting off a plant, it will be an exact copy. again, always take more than you need. don't take a mutated limb off, lol. fairly easy to avoid...
i've had mothers for nearly 2 years and regenerated them every 3-4 months. at no time did my yield or quality of weed every reduce. you can end up with hardened ovules with a very old plant (age measured from original sprout) - these make weed taste liek shit. it'll look fine, but you'll see little white specks you didn't see before in weed and it isn't seeds, lol... not all will do this. some do it sooner than others.