EXCLUSIVE: Vanessa Grimaldi Drives Nick Viall's Family to Tears on 'Bachelor' Finale

Is it Monday yet?!

Nick Viall's season of The Bachelor comes to a close on Monday night, and ET has this exclusive sneak peek at the drama that's set to go down!

Per Bachelor tradition, the remaining women -- Raven Gates and Vanessa Grimaldi -- will head home with Viall to Wisconsin and spend time with his family. Things get very emotional between Viall's father and Grimaldi.

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"I have never been proposed to, I've never been engaged, so I take this very seriously," she tells him. Grimaldi explains that she loves Viall, but asks his father if "love is enough" ... and their conversation descends into tears! Watch it all in the clip above. 

The question is, will Viall wind up with Grimaldi, Gates ... or no one at all? On the season's penultimate episode, Viall and Grimaldi had what she called "heavy" discussions over their potential future together. She is from Canada, while Viall lives in Los Angeles, making building a life seem daunting. Viall has also said from the start of his season that, if it didn't feel right, he wouldn't propose to anyone.

At the show's Women Tell All taping, Viall teased the finale to ET as, of course, "dramatic," and would only say that he is "maybe" engaged. Some of his exes, including Alexis Waters, guessed he would choose Grimaldi.

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The Bachelor
's season 21 finale airs Monday night on ABC.