A smaller black hole cannot orbit within the event horizon of a larger black hole, as their orbits would become nonlinear, leading to strong gravitational waves and eventual merger. However, a swarm of stars could theoretically exist within its own Schwarzschild radius, potentially allowing for a black hole at the center of this swarm. The concept of event horizons becomes complex in this scenario, as traditional definitions may not apply, necessitating alternative terms like "future outer trapping horizon." The discussion highlights the need for careful consideration of gravitational effects and the nature of spacetime within and around black holes. Overall, while intriguing, the idea of a black hole existing inside another remains speculative and requires further exploration in theoretical physics.