Gaining

Not a great Title...but I couldn't figure one out right away and wanted to get into it.

So my wife is gaining ....at least I think so...actually I am sure of it, but don't know how much. Me being the FA/ weight gain guy that watches and notices even the little things that develop with her figure.

First question for the ladies, would my wife notice a 5 Lb. gain on herself?
(She is 5' 3" +....and very curvy....probably 150-160 Lbs.)

At what weight do most women notice their gaining and try to start to lose? I know there are many variables but if you could expand a bit on your past or other friend's.

Do any of you look much heavier at the end of the day than the morning?

Reason I ask is because she tends to look much bigger ...especially in her belly in the evening almost as if she is full and very stuffed and gained a good amount of weight.....but in the morning she is softer and more jiggly in the belly and ultimately look's thinner then!
She has certainly been eating and snacking way more so I have anticipated that she would gain.

Thank's in advance for any input because I would like to know first hand answers to some of these questions and any more related.....to women's stages of eating and gaining.

Yes....very excited for her to gain.

She has gained and slowly lost many times (10+ Lbs. over the years) and a couple of times she got much heavier and it lasted much longer and each time several of the Lbs. stayed even though she eventually reduced back down to a more typical weight she used to be at.

I am just looking to have her gain to a much heavier weight than the typical 10+ Lbs. but was interested what may go through her mind as she starts to gain or continue to gain......or what was the reasons she gained so much the other times.

I do know, which makes sense that when she gains a lot more weight she can't really lose it for a long while .....probably because of eating habits and so much extra weight to try and get off becomes a bit more psychologically frustrating and harder to achieve, and ultimately resort to just eating and keeping the weight. .......which I would love if she never lost it.
Have you been there or experienced that because I am kind of just guesstimating.