Question for couples and or the ladies

My wife (42) and I (40), decided to do an extended fast to start off the new year. I have been off and on fasting for quite a few years, but haven't dug deep into a 7+ day fast in a long time.

My question revolves around my wife. She is now 5 days in and only down 4 lbs, compared to my 9 lbs. We had a discussion about it and she is very discouraged at the moment. We both agree that of the 2 of us, she has a bit more work to do with fat loss than I.

I assumed she would have had a much better drop in water weight than she has had. Are there any other couples or women out there that have had similar experiences?