With Nick and Avery's wedding finally here, Sharon is out to ruin their big day. On the Sept. 12 episode of The Young and the Restless, Nick's ex looks at old photos and wishes she and Nick were the ones walking down the aisle.

"He should be making those vows to me," Sharon rants to Cassie. Cassie agrees and says he's making a big mistake.

Nick arrives with their daughter Faith, who screams that she hates Avery. Nick orders Faith to get ready. "I can't be late for my own wedding," he pleads.

When Faith refuses to cooperate, Sharon suggests Nick postpone the wedding. Nick won't and says he has to leave.

After Nick leaves, Cassie says, "He's having doubts." She suggests Sharon call off the wedding for him.

Sharon tells Faith she'll go to the wedding with her. Cassie is impressed that Sharon gave herself a reason to go and stop the ceremony.

Meanwhile, Avery leaves Dylan a message telling him she knows what's going on with the baby Connor drama and needs him to call her. (Dylan found out that he isn't Connor's father -- Adam is. He is angry that Chelsea would lie to him about the paternity of her son. Now, Adam is shopping around for lawyers to get his son back.)

Dylan Learns The Truth About Connor, Will He Abandon Chelsea? 

Avery later tells her friends that she couldn't represent him because she "can't be responsible" for Dylan losing another child.

Summer arrives at Avery's apartment and says she'll be her maid of honor. Avery beams. Once alone, Avery hears a knock at the door and finds Dylan standing there.

Later, everyone has arrived at the park for the wedding. Although Nick is there, Avery is no where to be found. The wedding guests wonder if she has gotten cold feet. 

Thankfully, the stunning bride arrives -- only for drama to start heating up between Nikki and Sharon! 

Stay tuned tomorrow for more The Young and the Restless spoilers.