Everyone in this world is very different in their expression of love and desire for a myriad of reasons. Whether their parents were loving people and doted on them. Whether they believe they're worth loving themselves. How their initial relationships in high school and college went. And whether or not they feel sexy themselves later in life. It's a soup of circumstance that makes every individual who they are and how they receive love and how they reciprocate it. It may not be an issue of "holding back" per se, but rather an issue of self appreciation or ignorance. This is why communication between partners is key. It can't be done in a "demanding" way, like "I need this and you need to do this for me" (which would obviously lead to your question pertaining to "is she faking for your benefit"). It's more about discussing the things above and coming to an understanding regarding how both of you interpret desire and being needed/wanted. Many couples merely act as "roommates," living in the same house with the sole purpose of raising kids. "You do your thing, I'll do mine." But for a partnership... that's two people coming together for the benefit of each other... for a greater good. For some, that's growing old together, for others it's running your marriage like a business, where both parties are the co-CEOs, for still others, it's merely thinking that this is what they were "supposed" to do, and now they're confused what to do now that they're here. Some check off boxes: 1) get married, 2) get a house, 3) get a dog, 4) have kids... etc. They're robotically checking off boxes, but not really understanding that the fundamental purpose for marriage is connection and partnership. It's not following a recipe. It's about communicating.

To answer your question, no, she's not faking. She's much more confident, being sought by Fortune 50 companies, works out quite a bit, and has an appetite for sex. She's in a great place mentally and spiritually.