Be very wary. It is pretty soon for her to be hitting bottom, often when a cheater has an early epiphany like this it doesn't take hold. They'll break up with OP and then resume contact in a few days or weeks except go even deeper undercover. Are the two of you still living together? If you're separated then don't allow her back right away. She should be going to counseling to help her resolve her issues. IC at first, then MC for both of you. Don't stop DB'ing!

Me: 59 w/ S17, D23, D26
Current R: 4 years
Previous M: 21 years; BD: 06-14-12; S: 09-10-12; D final: 03-17-14; XW:56