On her leave letter, it states the following:
She entered the UK in 2008 as a student. She has never broken any immigration rules. Under these circumstances, would she be eligible for ILR in 2018 (10 year route)?In order to qualify for settlement you must have completed a continuous period of at least 120 months in the UK with limited leave to remain granted because of your family life
If the above statement on the letter is followed to the word, she would need to spend an additional 10 years (2027) on her DLR.