Andy and Sam's relationship is still going strong on ABC's hit series Rookie Blue; but it will definitely get a shakeup as Sam's former love interest Marlo is slated return for Thursday's episode and some fans reveal she could be with child.

Marlo Returns To 'Rookie Blue' As Andy & Sam Hit Relationship Snag

The show not only shared a picture of Marlo's return on its official Facebook page, but it also looks like she and Andy will have an intense conversation as well. The caption, "Marlo returns to help on a case. Will this cause trouble in paradise?" was included as well.

While fans await the highly anticipated season finale of the show, they took to the show's picture to express their concerns over Marlo returning to the show just as Andy and Sam's relationship gets back on track. Some even gave spoilers that Marlo could be pregnant. (The show premiered in Canada weeks before the U.S. so Canadian viewers have already seen the season finale).

WATCH: Andy & Chloe Caught Up In Explosion on 'Rookie Blue' Season 5 Finale

One wrote, "Sam says he loves Andy and she has the key to his heart so if marlo is pregnant does not mean Sam has to marry her".

Another fan revealed that Marlo goes as far as showing an ultrasound in the highly anticipated episode.

"I was trying to work out what is meant to be the time frame between season breaks and how much time it means in the show. The ultrasound picture looked like 12 weeks which just doesn't add up in the time frame.. Hope it's not as don't want the story line to go down that path.."

One zealous fan wrote an intense comment, "No, no! Andy and Sam belong together...no crazy b---- better come and F this up!!"

Another added, "Oh crap not good Marlo coming back! Here we go, Sam & Andy all the way!!!!! Another rocky road to sadness."

But not all of the fans are Team Andy and Sam. One suggested that he go with Marlo because "Andy don't know who she want!"

Check out what really happens on the Rookie Blue season finale Thursday at 9/8c on ABC.

Tags: Rookie Blue ABC television