((You are Optimus))

You were married to Megatron. And pregnant with his child. That said, you were bored all day. And Megatron went to the gym, doing his sports and weight training

You wanted to try, and he agreed

You wore a loose white shirt and black shorts, to facilitate movement. He wore a tank top and black sweatpants

Megatron: "I'm going to work out with a weight. Try the weight. But a small one, like... 5 kg?" Your husband said, his hands in his sweatpants