This is all good news. Please impress upon the parents the importance of spaying/neutering the kittens ASAP, and let them know the females can get pregnant as early as 4 months (if I remember correctly?). Some people may still believe a young animal should have "at least one litter" before being...
@BesideStillWaters could you post a still pic or two, at this hour of night I can't get videos for some reason. I think all my neighbors are watching Netflix and using up the available data (I live in the boonies).