You, Me, & My Ex follows five couples testing the boundaries of love.

The show includes some wild configurations of what those relationships can look like.

Watch EW’s exclusive sneak peek above.

You Me and My Ex

Kayee Lovey, Jerry, and Jessica on TLC’s “You, Me, & My Ex.".TLC

But then Jerry’s girlfriend moved in and proved three’s a crowd.

Oh, and poor Jack.

He’s left trying to keep Lisa’s attention.

You Me and My Ex

Wendy, Jimmy, Lisa, and Jack on TLC’s “You, Me, and My Ex.".TLC

Then there’s Alex, Caroline, and Alex’s ex-boyfriend Stephen.Caroline met Alex at work.

She became Alex’s shoulder to cry on while he was dealing with Stephen’s cheating ways.

But Stephen is still around and Caroline has to deal with it.

You Me and My Ex

Alex, Caroline, and (on the phone) Stephen from TLC’s “You, Me, & My Ex.".TLC

Enter her co-worker Chantel.

Now, Jennifer and Chantel are married.

But Josh also got remarried to Danielle, who soon became pregnant.

You Me and My Ex

Danielle, Josh, Jennifer, and Chantel on TLC’s “You, Me, & My Ex.".TLC

But John and April took being neighborly to new heights when they fell in love amid their failing marriages.

After both couples divorced, John and April continued dating.

But Roy and April remained close friends and John isn’t so happy about it.

You Me and My Ex

April, John, Loren, and Roy on TLC’s “You, Me, & My Ex.".Daniel Clark Cunningham/TLC

How will this all play out as John and April’s wedding approaches?

If you’re a fan of TLC shows, you know there’s going to be some hurdles.

You, Me, & My Expremieres Sunday, June 20 at 10 p.m. ET/PT on TLC.