The Saxon Rose — Fiona Neal

Because Lady Gwyneth had problems with sleepwalking her father has forbid her to marry and has denied all her former Suitors, even though she was his only heir... Her father feared that when Gwyneth's future husband would discover her secret and the man would denounce her as a witch.........
It's not unusual to find herself awakening in the woods, but the night Lady Gwyneth sleepwalks into the arms of a Norman knight she realizes the danger of being accused of witchery is strong ... and terrifying.