Can you write about Yomo being in a happy stable relationship, but his s/o is nine years younger and because of the age gap he feels guilty?

I can always write about Yomo.

Yomo marvels at his s/o’s beautiful and nubile body, stretched out over him and bathed in morning light.

“What is it?” His s/o cracks their eyes open. They stretch and snuggle closer to Yoyo’s chest.

He sighs. “Just…I love you.”

They regard him with a telltale smile. “You’re worried about how old you are again.”

“I’m not old,” he says gruffly.

“I know that, but do you?” They reach up to tap his nose. “You’re whom I’ve chosen to be with, Renji. I don’t care how old you are or what species you are. I want you.”   

“Sometimes…I feel like I’m depriving you of your youth,” he admits, nuzzling their shoulder. 

“Ha!” They throw back their head. “You’re the best part of my life. I don’t feel deprived. I’m happy.” 

“I am too,” he says honestly. “That’s, I think, where the fear comes from.”

“Well, I understand.” They entwine their fingers with his and give him that striking smile that never fails to make his heart skip. “And there’s no one I’d rather spend my youth, my middle age, and my latter years with.” 

Yomo pulls them close for a passionate kiss.