Disclaimer: I don't own the show or the characters. They belong to CBS and Carter & Bays.
When Robin learned she was pregnant, it was a month after she slept with Barney.
Barney and Ted's friendship had been repaired, but Robin wasn't sure what was going to happen now. She was definitely planning on keeping the baby, but she really needed to talk to Barney.
She decided to tell Lily first. "I'm pregnant," Robin confessed. Lily stared in shock.
"Is it Barney's," Lily asked. Robin nodded.
"I'm keeping the baby, but I still haven't told Barney."
"You need to tell him," Lily said. "This affects Barney in a major way.
"I'm scared," Robin confessed. "I'm not sure if I'll be a good mom."
"You'll be a great mother," Lily assured her.
"Do you think Ted and Barney's friendship will survive this?" Robin asked. Lily shrugged.
"You'll just have to see," Lily replied. "The good news is, you're going to be a mommy!" Robin passed out in shock as the news finally sunk in.
Robin and Barney would have a bumpy next eight months.
Things were going to change drastically for the group.
TBC
I came up with this idea about an hour ago. I actually had this idea where Barney and Robin eventually became exclusive, moved in together, but never married. They ended up having eight kids and died together in their sleep. Would any of you like to see that story too? This is just the prologue, so stay tuned.