bettsplendens:

Soundwave decides to take advantage of an empty ship to have some fun in Megatron’s throne, Megatron walks in and finds him, a considerable amount of fun ensues. 

Loosely TFP, but with Megatron actually sane and a decent person. This is like good-ending TFP, basically. No significant warnings. Improper use of data-cables, some awkwardness and general embarrassment, and relatively minor fluid stuffing with a biological basis- i.e. overflow tanks are a thing in Cybertronians and get full when you have a larger-than-you partner. Spike-in-valve smut, little bit of showing off, gets a bit fluffy. Definite praise kink somewhere in there. 

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