•  Actors Jared Padalecki (L) and Jensen Ackles attend Entertainment Weekly's PopFest at The Reef on October 29, 2016 in Los Angeles, California.

Actors Jared Padalecki (L) and Jensen Ackles attend Entertainment Weekly's PopFest at The Reef on October 29, 2016 in Los Angeles, California. (Photo : Getty Images/ Alberto E. Rodriguez)

With the impending birth of Lucifer's son in "Supernatural" Season 12, the Winchester brothers will have their hands full trying to find Kelly (Courtney Ford) while dealing with a new case. Meanwhile, Mary's (Samantha Smith) hunting activities and mysterious actions will lead Dean (Jensen Ackles) to suspect that their mother might be hiding something from them.

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The upcoming "Supernatural" Season 12 episode 13 will mark the beginning of Dean and Mary's relationship issues. Titled "Family Feud," Dean will start to question some of their mother's motives, as shown in the preview clip posted on Spoilers Guide.

With the Winchester matriarch claiming to be too tired to join her sons in their current hunt, Dean will become suspicious of Mary's excuse. Despite Sam (Jared Padalecki) trying to convince his brother that their mom may need the rest given her own hunting activities, Dean will remain apprehensive about the situation.

Given that Mary has been secretly working with the British Men of Letters, the said character's partnership with the organization might cause a rift in her relationship with her sons. At this time, it is unclear if she will soon come clean about her affiliation with the said group.

Apart from Dean's growing distrust over his mom's activities, the said episode will also feature Kelly's attempts to hide from the Winchesters and the angels who have been hunting her. Pregnant with Lucifer's baby, the said character will be rescued by a demon who described her unborn child as their savior.

Viewers can also expect to see a family reunion between Crowley (Mark A. Sheppard), his mother Rowena (Ruth Connell) and her grandson Gavin (Theo Devaney). In an interview with TVLine, Connell teased that the said episode will be a "big one" for the three characters that will include some "borderline shocking" scenes.

"Supernatural" Season 12 episode 13 will be released on Feb. 23, Thursday, on the CW. Watch a teaser clip below: