Yes, its fully possible. As long as she isnt in any distress no problems, you dont need to panic.
But it may be wise you contact your vet, especielly as Im sure you do have a vet, being a breeder.
The first kitten seems big and fully made, so if there are more kittens, they are probably fully done too. Thus, if the vets wants to induce further labor, there shouldnt be problems with it. (you dont want force them out too early and get prematures in your hands - if so, its better to wait them out).
Cant you palpate her some? If you feel the kittens move, you would know more.
Hey Simba's Pride - how are things going? Any more kittens? Hope all is well. I keep tuning in and am disappointed that you haven't posted anymore updates...
Gestation period for a cat is 62-63 days! I don't know enough to advise you other than that, but idk if that blob was normal! I would call a vet immediately!!! Kacey