The Frankel filly has not been sighted since she finished fifth in the 1000 Guineas at Newmarket, after which she suffered a setback.
But Fair Eva is back in training and might even be given the chance to shine in the Kingdom of Bahrain Sun Chariot Stakes at Newmarket on October 7.
Charlton said: "We've not made a plan but she is in full work.
"Whether she makes it back to the races or not, I don't know.
"If she did, the Sun Chariot is a possibility."