Supernatural's Rowena has more secrets up her flowing sleeves, ones which we hope will come spilling out during season 11.

'Supernatural' Season 11: Jensen Ackles To Direct Which Episode? Title & Femme Fatale Announced

Last fall, the CW drama floored fans when they introduced Crowley's (Mark Sheppard) devious mother, but the pair's season finale confrontation made even the worst Thanksgiving dinner seem like a joyous affair.

Now that filming for season 11 is just around the corner, Ruth Connell has opened up about Rowena's fraught relationship with her son and the secret behind Crowley's father.

'Supernatural' Season 11: Are Misha Collins & Mark Sheppard Series Regulars? Cas & Crowley's Future Revealed

"I mean we still don't exactly know who his real father was, and Olivette said something about 'you lay with a man with no magic'. There's something there. And I have my own theories about it," Connell told Fangasm, reminding viewers how odd it is that she left "Crowley at age 8 and was taken in by that poor family and managed to actually love and have feelings for a boy Oscar, who was 8..."

It's clear Rowena isn't completely incapable of love - although she is also perfectly of killing the ones she loves - and it's that fact which appears to hurt Crowley the most. Considering where season 10 left off, it's safe to say that the pair will be more interested in murdering each other than having a heart-to-heart.

"I think there's so much scope for backstory," Connell teased.

Find out more when Supernatural returns to The CW on Oct. 7. Click the video below to see the season 10 gag reel.