Adam Levine and his wife, Behati Prinsloo, have reportedly had marriage troubles in the past.

And after Behati Prinsloo was spotted alone in an airport twice and partying out with her pals without her husband, there are speculations that Adam Levine and his wife could be having another big fight.

Is the model and "The Voice" mentor's relationship on the rocks?

Behati Prinsloo was seen leaving LAX for a flight out of town Tuesday last week, and the model was sighted arriving back at the airport Friday of the same week.

Just after two days, the model was once again seen at the airport alone, jetting out of Los Angeles.

In between the flights, the wife of the Maroon 5 frontman was spotted partying with her friends - again, with Adam Levine nowhere in sight, according to Daily Mail.

Is "The Voice" coach and his wife spending less and less time together?

It may be reasonable that Behati Prinsloo was seen travelling alone, busy as she is with her gigs as a model.

With Adam Levine also being busy on the set of "The Voice," the two may be exerting extra effort to see each other despite their demanding careers. It has been previously reported that marriage has not made Adam Levine less of a playboy, and his wife isn't happy about it.

"Adam's acting like the same playboy he was before they wed, and that's a problem for his wife," a source told In Touch magazine, as previously quoted by Hollywood Life.

"She thinks it's disrespectful for him to flirt with other girls when he's married to her ... He goes out all the time and hangs out with other models," the insider added. "Recently, Adam had a guys' night out and Behati found out he was chatting up girls. She was livid and they had a huge fight. It's a sore spot for her."

However, reports also claimed that "The Voice" mentor seemed to have made an effort to make it up to his wife, sparking speculations that the couple is now doing a lot better after adjusting to married life.