What I remember:
1. The wife of the main character name is Jennifer, she is 40-50 yo, she is very friendly, at somepoint she wore a somewhat see-through white bikini, while she acts nice and pure she gets very turned on by someone watching her have sex. Her job is a physician
2. The plot: with the kids all out of the house a 50~ yo married couple goes to the Caribbeans for a vacation, there they meet a younger couple with the names (I think, I might be wrong here) ophelia and tim. Tim job is also a physician and earlier in the story ophelia watch the main couple have sex. At some point fairly early own the husband and jennifer goes to a couples massage and there the massuer makes Jennifer cum altho without any obvious sexual acts apart from touching her breasts and a few touches to her pussy and clit with the back of his hand
1. The wife of the main character name is Jennifer, she is 40-50 yo, she is very friendly, at somepoint she wore a somewhat see-through white bikini, while she acts nice and pure she gets very turned on by someone watching her have sex. Her job is a physician
2. The plot: with the kids all out of the house a 50~ yo married couple goes to the Caribbeans for a vacation, there they meet a younger couple with the names (I think, I might be wrong here) ophelia and tim. Tim job is also a physician and earlier in the story ophelia watch the main couple have sex. At some point fairly early own the husband and jennifer goes to a couples massage and there the massuer makes Jennifer cum altho without any obvious sexual acts apart from touching her breasts and a few touches to her pussy and clit with the back of his hand