One In Christ and a question

I'm looking to add the One in Christ B books for the summer - books 10, 11, 12. If you use this curriculum and are not using the summer months, please let me know. Also, how much you would like for them.

On a side note, I have a student who is 3 years old that attends four days a week. She arrives at 6 a.m. and is never picked up before our closing time of 6 p.m. Her mother works early mornings at a local grocery store but she has her child stay until our closing even though she is done at work by 3. Her mother now wants to add a 5 day, which isn't available at this time; but, honestly, I am really struggling with thinking of a child being at the center for 60 hours a week. We do not have a policy in our handbook regarding this. Is this an acceptable practice or should I seek to limit the hours children spend in our care? I would appreciate advice on this, so thank you in advance.

Blessings,

Donna Kent