[Warning: This interview contains spoilers from the fourth episode of Shameless' fifth season.]

Last The Hollywood Reporter spoke with Shameless star Haylee Bennett, she teased Fiona's attempts at maturing during the fifth season of the Showtime dramedy. But maturation for a character like Fiona, who hasn't had a stable home environment or any traditional role models, may be relative considering the events of Sunday's episode.

During the hour, Fiona took a very adult step when she married musician Gus (SteveKazee), but she did not do it with any traditional planning or sense of forethought — effectively following Gallagher tradition.

Below, Bennett talks about the fallout of the marriage and how it will influence the remainder of the season.

The Gallaghers have done a lot of crazy things, and Fiona, of late, has done her fair share, too. What was your reaction to finding out she was going to marry a guy she has only known for days, especially while she was still pursuing her boss, Sean (Dermot Mulroney)?

This was actually one of the storylines that I knew about beforehand. Usually we learn about storylines when we sit down to do a table read but they gave me a treat and let me know what they planned. I thought it was brilliantly insane. It’s pure chaos which works for the life Fiona has been living lately. She has this crush on her boss Sean who is trying his hardest to stay away from her and she was into this guy who it turns out had a girl all along. She’s sort of free falling and then here comes Gus representing normalcy. Makes sense that she would just jump into something without thinking.

You've talked a lot in the past about how you see Fiona as an addict but one revolving on chaos instead of drugs. How much does that define her decision here?

It defines her decision to a T. I mean she was trying to get with his bandmate and only turned to him to save herself from humiliation. They sleep together and it just seems like he’s more into her than she is into him. We’ve seen how she is with nice guys. At the end of the day Fiona doesn’t believe that she deserves a happy ending so until that mindset changes her life will always be chaotic. But I actually like what I’ve seen of Gus so far so I have my fingers crossed!

There was a look on her face for a moment in the courthouse where it seemed like she realized she was making a big mistake but obviously went through with it anyway. Does she begin to regret getting married?

I’m not playing it like she’s regretting it. I’m playing it that slowly the fact that she’s actually getting married is hitting her. While standing there staring at this guy she barely knows she realizes that this is real. She doesn’t believe in fairytales or happily ever after so she’s not thinking that far ahead. But in the last couple of episodes we see that she’s starting to see that she’s a mess so in the back of her mind she’s wondering if it’s fair to drag this guy who seems to be a level headed nice guy into her mess.

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How is Gus and his relationship with Fiona different from the others she has had recently?

Well he’s a musician for one and seems to be the deep intense type. He seems to be a good guy like Mike which of course doesn’t bode well for Gus. Fiona tends to chew up the good ones and throw them back out. He’s very good with his words and makes Fiona feel really special. She doesn’t want to mess things up but time will tell how destructive Fiona will be in this relationship.

Sean has admitted that Fiona's recklessness turns him on; will he see a quick marriage as another checkmark on that list? Where do things go for their relationship?

We’re actually going to see Sean deal with some issues of his own. We see him deal with his kid and his drug addiction. So for a bit the flirting will go on the backburner and it will be Fiona trying to be a good friend to Sean.

Now that they did go through with the wedding, what does life look like for theGallaghers?

Well we’ll see her hiding it for a bit. She’s kind of living two lives. The working girl, her coworkers all know about her marriage and she spends a lot of time staying with Gus and then the guardian of her siblings, she’s trying to balance being the older sister and the voice of reason. Then Lip decides to leave early and go back to school. He’s also battling with two lives and his school life wins out. There is a really nice scene between Jeremy and I where Fiona tells Lip and they discuss if she’s happy. I don’t think Fiona really know if she’s happy. She’s trying to focus on today and not think about tomorrow.

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What does life look like for the new couple in the coming episodes?

I’m going to have to use my favorite word again: chaotic. Jimmy/Steve is back. Fiona is a mess. Where does that leave Gus? Everyone needs to keep watching to find out!

Shameless airs Sundays at 9 p.m. on Showtime. Do you think Fiona can find true happiness this season? Sound off in the comments below.

Twitter: @danielletbd