Nhlapo was given his marching orders after he clattered into Toriq Losper to give away a penalty early in the first half.
Nathan Paulse put away the resultant spot-kick to give the Urban Warriors a 2-1 aggregate win and book a spot in the Final against Kaizer Chiefs.
Hunt insists the Bafana Bafana right-back was mentally fit to take to the field in what was a delicately poised encounter with the score tied at 1-1 after the first leg.
"All I can do is trust them [players]. Yes, we had a chat and it's one of those things and he said he's fine to play and I said okay.
"Yeah, sure [I considered leaving him out] but you make those decisions then you live and die with them. You have to trust your players and I trust my players.