Just two things.

Firstly what rpl says is right. An object can't just get trapped by the gravitational field of the sun. Finally it must end up with a net negative energy, and for this to happen it needs to lose a lot more than the initial kinetic energy it had at infinity. Since an orbit closer to the sun means lower energy, you would probably expect an intruder to have an orbit with a very large semi-major axis.

Secondly, this point about tides and the parting of the sea. Tides are a 1/R^3 force. This is why the tidal effect of the sun is much smaller than that of the moon. Thus a planet like Venus really has very negligible effect on the tides of Earth.