I agree with WyattSB. However, if you want to do it like this, you might want to start with a simple one-coin routine, with a dramatic 2nd coin production, followed by your 2-fly (which is very good btw) and then a 3rd coin production (also a bit more flashy). That way, there is a natural progression to more coins and a slight making the coin productions dramatic will distract from them being in your hands all along.
By the way, "dramatic" does not have to mean "hard" - a simple coin-from-ear production takes the mind briefly away from your hands to another "source" for the coins. Coin-from-pocket as suggested by WyattSB is even better as there is nothing "magical" about it and is an even better "source misdirection".