Before her Glee debut tomorrow on Fox (during the season finale!), Gloria Estefan is talking about stepping into the role of Sananta’s mother.

She hints at what part her character will be playing; it’s more than just attending graduation. From The Hollywood Reporter:

After forsaking her career, Maribel wants the best for her daughter during two key scenes in Tuesday’s “Goodbye” episode, when Santana joins Rachel, Finn, Kurt, among others, when they move on from Lima, Ohio. With a scholarship to the University of Louisville on the table thanks to Sue (Jane Lynch) and Santana’s girlfriend, Brittany (Heather Morris), Santana isn’t totally sold on the idea and, like her mother, wants to be a star.

“They’re graduating and they’ve got decisions coming, information is coming to me that [Maribel] didn’t know and to another person that’s kind of shocking,” Estefan teases. “Maribel is a typical supportive mom and didn’t get to go to college, so she wants Santana — like I want my daughter — to go to college. She had to put her dreams second and she doesn’t want that for Santana, she wants her to be educated and the best that she can be.”

Part of that undoubtedly will entail helping Santana make the tough decisions about her future — and how it could potentially impact her relationship with Brittany, with Estefan noting that there is a conversation about their relationship that opens up other questions.

“Maribel thinks a relationship at that age is going to tie you down to some degree, and as a parent, you want your child to have time to blossom,” Estefan says, noting she responds to her daughter’s dimwitted partner in the same laughable way everyone else does. “It’s tough to start that early in a relationship but you want them to feel loved and to experience that; all that is going through her head.”

Estefan goes on to confirm that she actually does not sing during the episode – a disappointment for fans of the artist!

Glee 3×22 “Goodbye” airs tomorrow, May 22, at 8 p.m. ET/PT on Fox!