In many 'verses, omegas will "nest" before their heats. This involves gathering many soft items (often blankets or t-shirts) that will comfort them during their time of vulnerability (their heats). The clothes typically have a pleasing scent to them, which is usually an alpha's they respect or admire. If the omega has a pack, it is not uncommon for the entire pack to contribute an article of clothing to the nest.

Once the nest is complete, during the heat, the omega will spend the entirety of their heat time in it. Think of it as "nesting is the 'steal your bf's clothes' thing but MAXIMUM OVERDRIVE." Rarely do alphas or betas get to nest with the omega outside of the heat - the only thing they'd get out of it is the satisfaction of knowing that they're their omega's chosen alpha and that their omega likes their scent.

Omegas do not typically nest outside of heats