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Band or DJ seson 8 episode 13

Robin wants Barney to ask her father, Robin Sr, for his blessing on their wedding. However, her father turns out to be less than cooperative. While Barney attempts to win over Robin's father, she notes her father's repeated insistence to add him on her Facebook friends list. When Robin finally accepts the friend request, she is bitterly disappointed to learn that her father remarried and never told her (despite proudly proclaiming it on his page). Because of his lack of involvement in her life, Robin declares that she will marry Barney without his permission and she will not invite him to the wedding. Barney later helps the two reconcile and Robin Sr agrees to her request to share a dance with her at the wedding.
Meanwhile, Ted and Lily fight over whether to hire a band or a DJ for the wedding - Ted is determined to hire a DJ and blocks all of Lily's attempts to hire a band requested by Robin. With Marshall taking care of a constipated baby Marvin, Lily forces Ted to admit his unhappiness towards Robin and Barney being engaged by revealing a terrible secret of her own: sometimes she wishes she never became a mother. Though she loves Marvin and being his mother, she feels exhausted and unhappy that she was unable to fulfill her dreams as an artist. Ted finally admits hating the idea of Robin marrying Barney and feels extremely hurt, even though he's happy for both of them. Lily thinks that both she and Ted need to accept the pain in their lives and move on; Ted agrees to hire a wedding band.
Future Ted recollects meeting his ex-girlfriend Cindy and her partner a week before the wedding and he revealed how the band Robin picked cancelled at last minute. Upon hearing the news, Cindy immediately suggests a replacement: her ex-roommate's band is available for the wedding since they were dropped from their gig. Future Ted goes on to tell his children that if Robin and Barney had given into his insistence on hiring a DJ, he would have never met their mother.