New details surfaced about the relationship between Ted and The Mother in How I Met Your Mother's final season.

Show co-creator Carter Bays explained in a recent interview with TV Guide that just because the meant-for-each-other characters will finally meet, it doesn't mean they won't have obstacles to overcome.

"Their life after they meet won't be perfect. How could it be?" he said. "Even 'happily ever after' has some bumps in the road, and we'll see them."

Talking to Paste magazine, Bays promised that their issues wouldn't be over small things.

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"Without giving too much away, because I like the way it unfolds, it happens in nice, surprising ways I think. We don't want to just be 'okay, now he's met the mom, and now here's Mad About You and here they are fighting about how he forgot to put the lid down on the toilet'," he said. " It's not going to be that."

New star Cristin Miliotti hinted at the eighth episode of the season, titled The Lighthouse, won't be the one where the characters struggle in their relationship. The actress described the episode as "really heart-warming and very, very exciting," and it will feature another flash-forward scene with Ted (Josh Radnor) and The Mother.

Bays also revealed that the show's ending is already written.

"We've known what the last 15 minutes of the series is from the very beginning. It hasn't changed fundamentally, but it's definitely been enriched by what we've written between then and now," he told the publication. "I think it will really encapsulate what we love about the show. I mean we're not trying to do anything that's too groundbreaking or daring."

"The show is a celebration of life and of love and of friendship and of living your memories. Making memories and living the kind of life that you're really happy about down the road. And it's all in there," he said.

How I Met Your Mother airs Mondays at 8 p.m. on CBS.