Can't view old purchased iTunes album
During a long car ride from North Carolina to Ohio, my mother decided to play many of her songs off of her iPhone. Eventually I became bored of them and suggested playing an album that I had purchased off of her account a few years ago. She agreed and I began to search her iPhone but didn't manage to find the album there. I then searched through her iTunes Purchased section (she has access to 3G) and couldn't find it. In a final attempt, I searched up the album on iTunes and found it. The price was $9.99, although it was a previously purchased album, so it should just have an iCloud button next to it. I've been trying very hard to figure out how to get this album back. As a young teenager with no source of income, spending 10 dollars for an album is pretty expensive, especially since I know it's already been bought.
Is there any way for me to retrieve this album without purchasing it for a second time? I also have iTunes on a Windows 7 laptop if that helps. Thanks in advance to whoever decides to help me.