Rainbow Dash peered over Apple Dash's shoulder, her smile turning into something more like a smirk. "I see Spike's found the cupcakes Pinkie made for him. I better go stop him before he eats too many and gets sick again."
Applejack nodded, and Rainbow Dash trotted off towards her husband.

I have never seen Rainbow x Spike in a story before.

I am okay with this.