Is it a good idea to keep a 6 week hand reared baby zebra finch, with its wild parents in the same cage?

I have a hand reared baby zebra finch that i took out of its nest as the parents where killing all the babies. i hand raised it and it is now 6 weeks old. we kept it in another cage but sometimes i feel it is very lonely so i put it in the same cage as its parents today and found it just stays to itself in some corner, ocasionally flys around it slightly gets scared when the adult (its dad) flys next to it and rarther wants to stay by itself, im not sure wether this is a good idea, will they fight, the baby is only 6 weeks old, and the adult is very mature and healthy. but i put it in last night for an hour, and they where fine, no fights just everyone was weaning by themselves no chasing around like crazy. shall i keep it in there or take it out please help! my one is hand reared and its parents are wild.