Debt of Honor (A Harlequin Romance #1962)

Sheila Martyn went to Greece as a adventure her father and she had planned, but now she was on her honeymoon by herself. The man she is engaged to Hugo Buckley stays behind to care for his (faking) ill mother Olivia; who wants to break up the relationship, any way she can. She doesn't want to share her son with another woman. When she gets to Greece Sheila feels lonely. Then a couple Wilfred and Mavis Porter convince her that she should throw in her lot with them. Sheila soon finds these two fight constantly. Finally they are killed when Wilfred takes a corner too fast and in caught in an land-slide. Sheila is the only on to live, but she is badly hurt. Prince Rustan rescues her. He takes her to a make shift clinic in Ayios Andreas, Greece. Rustan has been on a walking tour when he sees the accident. He falls in love with Shelia, but Shelia tells him about Hugo. Rustan doesn't believe her. Soon Sheila sneaks away, she goes to Athens, Hugo is there waiting for her. He doesn't believe her when she tells him she is in love with Rustan. Hugo's mother now wants Sheila for her son, she feels Sheila is easier to control than Kay Corbridge, so now she wants Sheila back. Olivia even steals a letter from Rustan, addressed to Sheila, reads it, then burns it. This is the last straw for Sheila. She goes back to Greece. And alls well that ends well.