Is My Budgies Is Going To Lay An Egg?

[Unicorn fartz 0]

 Hello budgie lovers, 

 I have had my budgies for about six months and I’m noticing that my female budgie is bigger in the belly. She is also larger and has puffed up feathers by her bum. We think she is going to lay an egg because we have been noticing that the male is feeding her and bobbing his headed for her. They also have been very happy cleaning eachothers feathers recently. I did little research and we think she will lay her eggs soon.  Since we are very new to this we were just wondering if you guys have any tips.  We gave her nesting box today and her and the male were exploring it. We also gave her some nesting materials such as: shredded paper and some store-bought nesting materials. Right away she took the nesting materials and started to take them down to the nesting box. I was just wondering what you guys think I should do. Any tips are appreciated. Thanks

 There will be pictures of her down below.

[Unicorn fartz 0]

Hi again, she still has not layed but her poop is getting quite big and she has been sitting on the perch outside her nest box all day. Please give me some tips on what to do. Thanks