I would say get some tea leaves that she likes and steep in chilling wort at 180 with a good whirlpool would be my best guess. More tea, more flavor. And let us know how it turns out. I was thinking of doing something similar.
Im also trying to figure out do I use rice to keep it clear and get sugars or us 2 row and candi sugar.. also would citra hops give it a lil citrus flavor or should I use a diff
I'm not familiar with twisted tea, but I've brewed regular beers with tea. Most notably a green tea Belgian wit (absolutely epic), a chai-ed porter, a slightly tea-ed pils and I have other tea hopes on the horizon. These sound interesting?
as for imparting tea flavor, I find 1 to 2 oz/5 gal for most tea gives it a good and noticeable flavor. I would add as a dry hop-esque ingredient 10 days before bottling. I wouldn't add this into the hot liquid (wort or beer)
I've never had Twisted tea, but I made Drunken Emu's Mississippi River Water a few times. It's delicious. The only thing I did different is I batch pasteurized it before bottling and backsweetened with 6 cups of sugar, instead of using lemonade concentrate and I kept it still.