Lois’s answer to “Another theme I notice in your books is age differences between lovers or in relationships. Sharing…” > Likes and Comments

I think the V-verse really does have a fairly large percentage of significant age gaps between notable couples - also Baz & Elena, Olivia & Dono, Duv & Delia, Tien & Ekaterin, Silver & Leo, Jin & Aurelia (oh, sorry, that one's only in my head).

Roic and Aurie too I think

I have been struck by the number of age-differences as well. Cazaril and Beatriz; Ingrey and Ijada; Iselle and Ias; Aryhs and Cattilara; Ista and Ias all come immediately to mind. Don't forget about Iselle and Dondo ;)