Love Is Hard, Book I, Jill's Secret

Dennis, a database engineer, meets Jill, a project manager in another division at his company. He's intrigued by her and pursues her. She runs hot and cold and he can't figure her out, especially after a fantastic bout of sex, after which she acts like nothing really happened. There is a secret she is hiding as he knows nothing about her past. Is it really bad? Just a case off trying to cut ties? No matter what it is, after a few months, he realizes he is in love with her, and must face the truth when she is finally forced to come clean, by his own brother. Can he deal with it? Is he ready for this? Will his love be enough?