I'm more a teach a person fish rather than giving you a fish.
Make a folder on your PC (as on your pocket rocket AKA cellphone) Ask if your Domina, could she do the same? Every time you see something that interests you or you found hot, drop it in the folder. Use the folder for inspiration when you are both stuck.
Read stories, take notes of what got you hot. Another variation on this is write a chapter each, where does that take your mind or what scene idea are you getting from it?
Don't forget sites that have artworks (and stories) too like Sardax. Sardax has been around for decades (waves if reads this) his fantasies can be very inspiring. There are loads more Femdom artist worth looking at too. Still photgraphy that is porn works too!
Try the sites that are just for webteases like
https://milovana.com/ if it can be done online someone at Milovana will be doing it. What can you Domina re work to suit you BOTH.
RE visit kink lists and talk them over with your Lady what have you both overlooked or gained interest in, since you first went through your negotiation talks. We all morph and grow as time moves on. Research them and see where it takes you. Even if its not your kink...a little safety knowledge never hurts anyone! (pun intended)
Use what you find to create mood boards (just like home decorators do)
I create subfolders inside my inspiration folder, for E.G I liked the self tie I seen in a pic. I think that would work well with the remote butt plug, over a cam chat. But for that I just want him to see my boots. While talking I will paint a picture that his ass is being used by another Domme while he services my boots (Hey, one coffee on board that's all I got!)
another idea: One of my old onliners we used share hot pics and he would photo shop other ideas on top of them, like this would be hotter if x,y,z was happening and then I would add to it but if added a,b,c it would be way hotter!. Before we know it we had ideas out the wazzo!
look outside of your normal toys, what around the house strikes up ideas. For E.g using the kitchen. can you cook a meal over cam. Wash dishes balls chained to the sink etc while talking. Use the every day, kink it up then add to it, did you miss a dish? does that wooden spoon hurt or does the spatula hurt more? She might want to know! Whats insert-able, what deep throatable? Think outside of the area you normally play in . . Once you stop thinking "scene" and just "doing" its so much easier.