It's very possible that the mother fox is in the area. Check on how the foxes look - are they lethargic, do they seem ill? In that case, you can call animal control or a wildlife reserve to take care of them until they are ready to be released into the wild. Baby foxes can be okay until about 10 weeks old and then behavior can be unpredictable and they revert back to their wild ways. Domestication takes place at the genetic level. It is something bred into the animal and can take years of breeding. You can tame a wild animal to accept you, but it may not be so willing to accept other people or pets. You would also have to check laws where you live regarding keeping wild animals as "pets".