My Filipina wife is 28 years younger than me, and has a much stronger libido. My preference of having sex only 2-3 times a month left her feeling frustrated. Almost 2 years ago, with my blessing, she started dating a half-black guy around her age. Although my wife and I have sex a couple of times a month, her boyfriend has become her primary sex partner, and stays the night with us most weekends, and sometimes during the week.
My wife is deeply in love with her boyfriend, and they do many non-sexual activities together. I love seeing them cuddle together on the sofa, and whisper "I love you" or "mahal kita" to each other. However, I have never felt that my wife's love for her boyfriend has diminished her love for me. Indeed, in Filipino culture, marriage is a very important institution.