She seems pleased, and is either role-playing as an Asari...or the change was mental as well.

Sarah’s full, blue lips curled into a small smile as she replied, “Rather well, though I do find that one week is not much time for such a change. Perhaps a decade or a century would have been more appropriate, considering my new lifespan.” Her tone was casually neutral, not betraying any emotion aside from a hint of satisfaction.

In other words, she sounded a lot like an Asari from the games. Of course there were plenty of Asari who weren’t calm, high-minded scholars, like the hilarious bartender character, but the Asari were very much the elves of the Mass Effect universe, and Sarah sounded like she could have been recording voice lines for some extra to pass by on the Citadel. “Is that...role-play? Or is your mind actually different?” Tom asked her.

The smile grew wider by millimeters. “I am sure you would like to know that.” It was a clear dodge of his question, but Tom decided not to push it further. “Why don’t we just enjoy our day together?”

So, they did just that. It went by like normal, aside from the fact his wife was now a blue alien woman. Though, considering the Asari were a mono-gender species, even calling her a woman felt odd. That wasn’t the only thing that was different, though. Whether it was just her having fun or how her personality had changed, Sarah was a lot more reserved now, though perhaps even more physically affectionate, preferring to sit very close to Tom.

It was when they were preparing for bed, Sarah taking off her bodysuit to reveal her naked blue body in all its exotic glory, that Tom thought of something. “Wait, so if you’ve always been an Asari now...how old are you? Is your name still Sarah?”

It seemed the question hadn’t occurred to her. She reached down to the bodysuit she’d just removed and pulled out an ID card from a hidden pocket, reading it carefully before saying, “I’m definitely older, which is good. If I’d been the same chronological age as an Asari, I wouldn’t have even been an adult.”