I think Reilarie raised a pet in the clinic.
It's not that uncommon for therapists to raise one or a few pets since that's said to help patients' mentality.
A bit of context: https://youtu.be/TaNbeAMpius
Gigi and Okayu had a bit of alone time while waiting for their team's turn. They broke the ice by talking about boobies and such, and Okayu suggested they become Ecchi Friends.
DeepL translated it as "friends with benefits", which Gigi explained is another term for...
"Remember these two fingers, for they shall be the last thing you see before you see the heavens. Heh heh heh heh....." or something similar. Just my head-cannon.
^ AppleDash is canon in the original MLP, while RariJack is canon in Equestria Girls. They literally had a whole movie or maybe an episode (I can't remember), where they acted like a jealous couple.