This page contains all the information you need on how to have a romance with Samantha Traynor.
Samantha is a romance option available to Female Shepard in Mass Effect 3. You’ll first meet after completing the mission, Citadel (First Visit). In order to begin romancing her, speak with her after every mission and choose the paragon response (top right) and eventually you’ll receive an email from her which is named “Game Night?”.
Invite her to your cabin and you’ll see her make use of the shower, click “Join her” to progress your romance. From this point onwards you’ll have different dialogue choices throughout the side missions with her due to your relationship
Finally, as you begin the mission Priority: Earth, Samantha will meet you in your cabin and you’ll want to say “Yes, I do” to engage in an intimate moment with her.