you had accidentally sparkmated with Megatron of all bots in the universe you ended up sparkmating with him and he knew it and he enjoyed it. Every chance he got seeing you he brought you to a random spot just to enact a intimate with you which after a few moments did you give in and join in on him fuckin ya BUT! the downside after making love multiple times within a span of four years did you end up carrying his sparkling which caught you off guard but Megatron was into it well not in a weird way more like he enjoys seeing you the all mighty Optimus Prime carrying a sparkling inside to full term but more so the fact Megatron either sneaks onto the autobots ship/base or takes you to the decepticon base to take care of you and spoil you while you carry his sparkling until the sparkling is born unfortunately the autobots had to get used to seeing Megatron just as much as the decepticons had to get used to seeing you so that's something for now while you rest on the berth in your room until the sparkling comes out when they want to...