Single line to family plan while keeping unlimited and all the discounts....or alternative?

[RussianMenace]

Ok so here is the deal. My GF of 6 years and I are getting married in a few months and we want to start consolidating some of our bills/services, starting with our phones. She's on ATT and I'm on Big Red. Right now I have Unlimited Data + Unlimited Text + 450min/mo. I'm paying $69.89/mon which includes 21% work discount along with a $20 discount from years ago for having unlimited txt + data bundle. What I want to know is, can I bring her over to Big Red onto my account while keeping unlimited data + discount(s). If not (and this is a big if, as I REALLY don't want to lose unlimited data), what are some other cost/effective approaches, if any.

Anyone have any experience with something like this? Suggestions/concerns/ideas?

~cheers