Pick a lot of locks. Also, be a snarky asshole and always ask for money every time someone asks you to do something. Or just do drugs. All the drugs. At once.

Eventually. There's very little actual sex in the game, it's like Skyrim marriage.

Get naked
Get her naked equip her with something like Kellogs outfit, then tell her to equip an armor piece. Dequips the 1-piece outfit and now she's only in the shoulder pad, which you then remove. I know this because reasons
Fast travel to every area of the map you have unlocked
Wait for her to bitch about Vault 85
Do the thing at Vault 85 (Bring mini-nukes because Assaultrons are hungry for prostate)
Repeat previous steps of fast traveling
Done
Drop her because she's annoying as **** when she loves you and her perk is ****

There's a reason we have an entirely community dedicated wiki for the Fallout series:

fallout.wikia.com/wiki/Piper_Wright

Use it.

Don't listen to the guy below me, he's lying

Pick ALL the locks

It's a synth helmet, and you can get it (guess) from dead synths, or buy it in the institute.

Thank you man! I had lost all hope for an answer

np m8

Much like all the other aspects of the game Bethesda tried to rip off from bioware, the romance falls flat on it's stupid face because they neuter and streamline it. Just like the dialogue system and companion morality.

Don't get me wrong, I love the game, but the dialogue makes me want to throw things at Todd Howard.