Suits You, Sarah

Suits You, Sarah or Vault Gear (GECK name) is an unmarked quest in Fallout: New Vegas, given to the Courier by Sarah Weintraub.

Quick walkthrough

 * 1) Talk to Sarah and bring her at least 30 vault jumpsuits.
 * 2) After that, you will be able to have sex with her, be Well Rested, and have a discounted stay.

Detailed walkthrough
After following the right dialogue tree, the player will be able to sell Vault jumpsuits to Sarah. She will accept jumpsuits from any of the in-game vaults, except for suits stolen from the guest rooms in Vault 21. With a Barter check of 65, she will accept Boomer jumpsuits and Boomer flightsuits. Vault 3 suits can also be bought at Mick & Ralph's, but they will only have 1-4 suits, and once you've purchased them they do not restock.

Vault 3 and Vault 11 both have large numbers of jumpsuits in dressers in their living quarters (24 & 28 respectively). See Vault jumpsuit for more locations.

You will receive caps, Strip reputation, and a discount on the Vault 21 guest room. After you bring her 30 Vault suits, she'll mention that she's missed you when you visit her next. You will then be able to have sex with her as you both "catch up" with one another in your room, which gives the Well Rested bonus (which is normally not earned by sleeping in Vault 21's guest room). Also, after two Speech checks, 65 and 75 respectively, she will agree to have sex after receiving suits, along with accepting Boomer suits.

Bugs

 * Sarah won't accept the Vault 21 jumpsuit you are given at the beginning of the game.
 * Sarah will sometimes use a deeper female voice upon greeting you or after finishing a trade.
 * Sarah will sometimes take Vault 34 suits, but won't accept Vault 22 suits.
 * If you take jumpsuits from your companion while you're in the same room as she is, she does not detect it in your inventory. Fixed by taking the jumpsuits outside the store then reentering.
 * If the player leaves the vault after giving Sarah the 30 jumpsuits and she agrees to sex, without first having sex with Sarah, she will remain in the gift shop and it becomes impossible to interact with her.
 * Suits held by the Courier are counted twice: once upon entering the Gift Shop, and a second time when first speaking to Sarah. However, some of Sarah's greetings do not do this second count, making it possible for the Courier to arrive with a large number of vault suits, drop or transfer all of the suits, then engage Sarah in conversation and redeem the reward without actually turning in any suits.  Because only specific greetings are affected, this is only possible if the player has not turned in more than 30 suits total, including "phantom" suits turned in via this bug.
 * The specific greetings affected are the greeting that starts with, "Well, well! If it isn't the Vault explorer..." which occurs after giving her between 10 an 30 suits total, as well as the "Behave..." greeting which only is seen if you have turned in less than 10 suits total and have angered Sarah in conversation.
 * With Veronica as a companion Sarah will come to the room to have sex but then leave before and the player will be stuck.