Ultra Magnus is having the decorn from the Pit. First he finds out he's carrying a sparkling created by a brief affair. Now he's a prisoner on the Nemesis. It's bad, but it's going to get weird.

8 chapters, 21K words, complete.
archiveofourown dot org/works/631721

Prompt: tfanonkink dot livejournal dot com/11776 dot html?thread=12500224#t12500224

A Surprise Ending 1: A Bad Orn Turns Weird
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Every line in Ultra Magnus' body was weary as he was shoved into the holding cell in the Decepticons' brig and rough, strong hands chained him to the wall. The first interrogation of a high-ranked officer was always just a test of their resolve. Nonetheless, it was long and exhausting.

The past few orns had not been kind to the City Commander. A short fling with a Seeker on loan to his unit had created a permanent change to his life. By the time he had found out, Groundshaker had already moved on to his next assignment and was out of communications range. Even if he hadn't been, Ultra Magnus still might not have told him. He was enjoyable enough in the berth, but the Autobot Seeker was also reckless and irresponsible. Undesirable traits when looking at the long-term commitment raising a creation would propose. As the carrier, the ground mech had to look out for what was best for his newspark.

So far he wasn't doing as well as he should have been. Getting captured by the enemy certainly wasn't good for him and his creation. Even if the sparkling wasn't directly terminated once they figured out he was carrying, the stress and survival rations would cause him to miscarry if he were here long enough. It was a terrifying thought.

He could only hope that he was rescued before his creation was permanently damaged. It was one factor that his rank was likely to help with. It made him important enough to put effort into rescuing quickly, and for once he couldn't find it in himself to object to that importance. He might not be worth it, but the tiny and completely innocent life now orbiting his spark most definitely was.

Wearily Ultra Magnus sank back, bracing against his back and locking his lower joints to give his frame relief. Unlike the proper brigs the Autobots maintained, there were no berths or benches in these, not that he could have used them while chained to the wall and forced to stand. He was in the isolation sector, or at least he assumed he was. There were no other cells he could see into at any rate.

He was just settling into a low-level recharge when pedefalls reached him and he brought himself up to full alertness before the mech appeared.

Seeker. Purple.

He sighed in resignation. There was only one reason a mecha outside the interrogation types, Megatron or Starscream would visit a prisoner.

At least the overload would help the newspark, even if it was hard on the carrier. Hopefully it would be over fast. Seekers weren't known for their endurance.

"Oh, you are a big one," the grin on the purple mech's face was almost feral.

Skywarp, Ultra Magnus' tac-net eventually supplied.

Strong black hands ran down his chestplates until one curled around his interface cover. Resigned acceptance touched his field as the cover opened, exposing a valve that was unaroused but just slick enough to prevent damage. Accepting the abuse and not resisting would likely be the only thing he could do for his newspark at the moment. This one didn't seem to be interested in harming him if he didn't try to fight back.

and that's the end of the smut-free zone. This story is pretty much 8 chapters of PWP.
archiveofourown dot org/works/631721