The Young and the Restless spoilers suggest Mariah Copeland (Camryn Grimes) is hiding something, and it was very evident during the Tuesday, April 29 episode.

Still, what kind of secret is she keeping under wraps, and how will it affect her relationship with Tessa Porter (Cait Fairbanks) moving forward? Here are three possible storyline scenarios!

A One-Night Stand

As soon as Mariah entered Crimson on the April 29 show, Young and the Restless fans could sense something was “off” with her. She immediately looked guilty of something, so could she have engaged in a one-night stand with another woman?

After all, she returned from a business trip, so it’s quite possible that she may have crossed a line with someone else over drinks at the hotel bar. One bevy may have led to another, until she found herself in bed with someone other than her wife!

Met Up With An Old Flame

It’s hard to shake the idea that Mariah cheated, especially when she was acting so odd during Tuesday’s show. After all, she just had to go see Aria Copeland-Porter (Maddie and Millie Ingle) as soon as she landed … this screams guilt!

Still, a one-night stand is awful, but could Mariah have met up with an old flame? She may feel terrible about the possibility of an emotional affair and breaking up Aria’s happy home.

What if she ran into Lindsay (Kirby Bliss Blanton), the old bartender from Society, with whom she had an ONS with back in 2020? Then again, what about Tyler Michaelson (Redaric Williams)?

Mariah could’ve run into an old flame that has never been on canvas, and even if she didn’t cross a line, she may feel guilty about her feelings.

As Tess seems poised to dive into a romance with Daniel Romalotti (Michael Graziadei), Mariah’s cheating actions could open the door to a Teriah split.

Sharon Newman Is Not Well

Mariah mentioned to Tessa that she had talked to Sharon Newman (Sharon Case), and it seems as if she, Nick Newman (Joshua Morrow), and “the kids” are having a blast in Europe visiting Noah Newman (Rory Gibson).

Still, Phyllis Summers (Michelle Stafford) is still struggling to get her life back on track from her and Sharon’s kidnapping – so, could Mariah be lying about that?

What if she found out that Sharon had a breakdown, too, and is hiding the news? Could Sharon’s new storyline, when she comes home, center around another mental health breakdown?

What do you think Mariah is hiding? Drop a comment below! Watch the CBS soap daily to catch all the drama in Genoa City and visit this site often for the best Young and the Restless news, updates, and spoilers.