Looking for the title of old Harlequin book
Hi, was wondering if anyone can help me with the title of an old Harlequin book. I came across it in the early 90's but I don't know if it was from the 90's or 80's. The story was about two best friends who grew up together and later on fell in love with each other. I can't remember much detail except that the niece of the female lead character had, at some point, a fever so high that they had to cool her down in the bathtub (it was the first time I had ever read about that kind of remedy for a fever, which is why it stuck to me.). Another scene from the book was that the couple had been caught in the rain, and the guy said something like the girl's body had definitely change since they were kids. Sorry I can't remember much else, but I'd appreciate it if anyone could point me in the right direction. Thanks in advance!