The first mills and boon book i read about a year ago it may have been new not sure though. The story starts with the heroine upset and driving in the rain trying to get away from somewhere, She crashes her car and is found by the hero, who takes her back to his house to look after her. He has a daughter who is about 6. She becomes a nanny for him. After a while of working for him she gets suspicious because he sneaks around the grounds of the house so she goes to investigate. After seeing him selling something which she assumes is drugs she runs away. You later find out he is a famous artist under a secret name so the press cant find him ans he was not a dealer it was just his agent collecting his paintings.
The second book i remember less about, a woman goes on a school/college trip undercover as a student to protect her sister, the woman falls in love with the teacher the hero.