Initially, Rodolphus had not been pleased with an arrangement. He wanted to follow in his father's footsteps and join the Death Eaters, yes, but that's where his desires ended; he wanted to pick his own wife if he were to have one. Eventually he had no choice. It helped that she came from a good family and was easy on the eyes. In time, she grew on him as one of the best options he could've had. They got along, had similar tastes, enjoyed fighting with each other. By his current time he was used to years of trusting her and knowing her, and now it gave him all of the advantage.
The amusement was back. He couldn't help it, seeing that furious look on her face, her hands shaking while she tried and tried to get out from under him. He knew she wasn't going anywhere, though he still held her waist with one hand and dug the other into the tree near Bellatrix's face. She made demands as if they were possible. There were some memories of being younger and a bit smaller, when they were more closely matched, but the only way she'd best him now would be with a wand in her hand.
"Aren't we practically married in your time?" They had definitely met numerous times. "I told you - you're mine." The menacing tone still existed but he had softened, even letting up a bit of weight just to see what she'd do.