Something in Okoye had shut down after the event with Killmonger, she still refused to call him by his Wakandian name as she found him unworthy of it. Also, the betrayal of W'Kabi nearly killed her, although she refused to let it show. Okoye hadn't felt the same since. She was the same General if not a little more demanding on her warriors, fear of losing them in heart. But she was not the same woman. And then, Thanos happened.
So, to say that she was surprised when she felt a flicker of something she hadn't felt in so long, was an understatement. What had really taken her back was the cause of it; the Captain Steve Rogers. She hadn't seen it coming, after all those times closing herself off she wasn't expecting anything like that to ever happen.
She had thought that W'Kabi was the love of her life, that no one would ever take his place. So that's why she was fighting so hard against the feeling that was threatening to over come her. She had fought it every time Steve's hand would sweep all over her body, with every stare he would send her way, how his lips would bend in a flirtatious smile or in the way he would hold her close to him. She hadn't wanted to let him get too close to her in fear of going through what she had endured in the past.
And now with his head between her legs, lips and tongue taken their time worshipping her; his hands squeezing her thighs before caressing her flesh. Her hand buried in his hair, fingers pulling at the strands before pushing his head closer to her. She refused to think that what she felt was more than sexual pleasure, this was just to fill the emptiness she felt inside. That when his eyes crawled up her body to meet hers, what she saw in them didn't reflect what she had refused to let herself feel. There was no love, just filling the empty.
