Jennifer Carpenter has moved on from one brother to another, only this one is betrothed to someone else. The Dexter stunner was once married to her on-screen brother, Michael C. Hall. However, she is now reportedly getting romanced by Seth Avett of the folk band the Avett Brothers. RadarOnline.com is reporting that the undercover lovers have actually been dating since last year, all while the 32-year-old was married to wife Susan. A source tells that the "I and Love and You" singer and the 33-year-old Showtime actress have allegedly been making beautiful music together since 2011. The insider reveals, "Shortly after Jennifer's split with Michael, she began seeing Seth. She would fly all over to his concerts to be with him." For a long time, Avett was said to have been two-timing his spouse. However, it all came to a head at the end of last year when he left his wife for Carpenter. Now that the word is out, Avett is attempting to do damage control. He tried to put a spin on things in a message posted on the Avett Brothers' Web site. He wrote, "To all the wonderful Avett Brothers fans...Over the years, it has been my honor and privilege to share, through so many amazing experiences, a conniption with you all that is very special to me. It is in the nature of this incredible exchange that I feel it appropriate to share a piece of personal news. My wife and I have decided to end our marriage. We have been separated for some time. As I'm sure you will understand, this is a very difficult and painful time for us and our families. I want to wholeheartedly thank you for respecting our privacy in this matter and I ask sincerely for your prayers, support and understanding. Much love and gratitude...Seth Avett." Over the year, Carpenter has been an outspoken advocate for the group. Unfortunately for everybody involved, the affair supposedly caused a rift in the band. The insider tells Radar, "The affair was really hard on Susan, and even the band. It was former band member Jacob Edwards and his wife that really put Seth on the spot for cheating. They didn't agree with it whatsoever and were uncomfortable with the situation." So just how serious is the romance? Well, the band's last album, released this past fall, was called The Carpenter. And while some people might be able to overlook Avett's alleged adulterous actions, others are putting their feelings on the record. One fan wrote, "Seth Avett is a pig for cheating on his wife and Jennifer Carpenter is a very ugly woman." Another former groupie seethed, "Seth is a dog and Jennifer Carpenter is a homewrecker. Plain and simple. I hope he's happy now. I hope Susan is ok. No one deserves to be lied to. Seth deserves nothing. Not even his fans." Talk about making it personal.