Her giant breasts are nominally covered ... but in practice, nothing is left to the imagination.
She doesn't wear a bra. The 'covering' is carried out by a halter neck top, a blouse, a sweater, a t-shirt ... basically by something totally inadequate to the task. Size, shape, the outline of nipples, huge cleavage ... it can all be seen.
And that is the way she likes it. She cannot see any downside to showing the world just how massively HUGE her tits are.