Who's dominant?

In their bed Tera holds the lead and Sindy gladly yields. Tera grabs a handful of dark hair, pulls Sindy's head back, and watches the throat stretch. A single command leaves her lips and Sindy drops onto all fours, knees parting, back arching high. Tera slides behind, spits on two fingers, works them in deep. The wet sound fills the room. Sindy pushes back, hungry for more. Tera trades fingers for cock and drives it in, hips snapping hard. Each stroke presses Sindy lower until her cheek is on the sheets, mouth open, breath ragged. Tera leans over, palms pressed to Sindy's shoulders, keeping her pinned while she grinds deeper. Sweat slides between them. Every thrust forces a fresh sound out of Sindy, half moan, half plea. Tera answers by reaching under to pinch her nipple, twists once, then twice. Sindy shudders, legs trembling, still taking every inch. Tera does not slow. She keeps the pace sharp, relentless, until the smaller body beneath her shakes and contracts around the strap in tight, helpless waves. Only then does Tera ease the rhythm to a lazy grind, one hand still twisted in Sindy's hair, the other stroking soothing circles over her ribs. Their breathing syncs. The air smells of sweat and sex. For now, at least, the question of who leads has a clear, throbbing answer.