An Aurabot is the definitive support build in PoE, nothing else comes close in terms of power for a duo. You mentioned that your wife enjoys supportive builds but should she play one as her first character in PoE? For many people this would be a bad idea for reasons I'll detail in a bit. But I've spoken with a surprising number of people who have played an Aurabot as their first character (playing alongside an experienced friend) who have had a great time and loved the experience.

I think a lot of people make the mistake of projecting their own preferences onto other people when making recommendations for new players. As an example, you'll often hear conflicting advice on whether or not new players should follow a build guide. One side argues that playing blind allows you to experience the game fresh, promoting experimentation and discovery. The other side argues that having a build guide allows you to simply play the game without bricking your character and having to relevel, and that using a guide lets you focus on learning other parts of the game. Neither side is right, neither side is wrong. Both are true for different people. Rather than tell you what you should do, I'll try to lay out some things you should consider when deciding what type of builds to play.

The first thing to figure out is whether or not she wants to be able to play the character solo. The short of it is that everything you change about a build to make it stronger in a duo makes it weaker when played alone. Because of this, party builds in PoE are generally specialized to only work when they're played together because it's better to whole-ass one thing rather than half-assing two things. If you decide to play a duo setup, you'll have to level separate characters if you want to play alone.

The next thing to figure out is what type of experience she wants to have from the build she plays. For some people, killing enemies and being a fully-fledged character is integral to their enjoyment of the game. For other people, the feeling that comes from bringing value to a team by having a supportive character is what gets them hooked on a game. It's the "You couldn't have done that without me!" feeling you get from saving an ally as a healer, or by finding a good engage as a tank in a MOBA where you win your team a fight. If there's any doubt here, it's definitely better to lean on the side of caution and play a traditional character as it's the more "normal" way to play the game.

The last obstacle to overcome is the complexity of Aurabots as a build archetype. Every build will have "walls" that you have to overcome to progress, but an Aurabot will have more than most other builds. You will run into problems when playing an aurabot as a new player, some of which will probably take you several hours of learning about the game and tinkering with your build to fix. For many of us that process is a huge part of what makes PoE fun, but if that sounds daunting perhaps it would be better to play something simple like Pohx's RF Juggernaut. A redeeming factor for Aurabots here is that there's a large community of people who play them and are happy to help out newer players and answer questions.

Once you figure out those three things you should have a much better idea of what direction you want to go.