Without a doubt, the most ridiculous waste of time I've ever spent on a book, even though I skimmed through most of it. If the h had just told the H the truth, that - thinking she had no chance with him - she hoped to give his brother and his wife (her BFF) the son they desperately wanted, she spent the night with him and (jokes on them) had a baby girl instead, he would have said, "Oh, what the heck?" (After all the sleeping around he did he could hardly begrudge her a night in another man's bed, even if it did happen to be his brother.) And they could have had their HEA about 100 pages sooner.
Better still, Ms. Lorrimer could have skipped writing this one altogether!