The daughter of Kheleyf was the lowest rated in the six-strong field but she has a good record on the all-weather and was unfortunate not to win at Kempton last time out.
They went a good gallop up front with Penny Drops setting a searching pace. This suited Khatiba and jockey Graham Lee rode a patient race at the rear of the field.
She travelled strongly into the race and rounded the final bend just on the heels of the leaders upsides the favourite Majeyda.
When Graham pushed the button Khatiba picked up well to hit the front, passing the post a head to the good.
Roger said: "Khatiba had plenty to find on ratings with a few of these but she is improving and we knew she went there in good form.
"She has a very good record on the all-weather and it is great that she has qualified for Good Friday."
Khatiba winning at Kempton earlier in the year.