If you plug this in to a program like ICMizer, it might tell you, you need something slightly stronger to call here, because you are against two players, and the second one should have a fairly strong range. But it has to be pretty close, so its not like, this was a major blunder. Also if these guys were getting it in light, calling with 99 might be just fine. The fact, you were against QQ and AK, does not make it a bad call, since even a wide range will also contain the best
hands.