From thumbnail alone I thought this would be like, parallel universes portal/selfcest shenanigans, but now I'm just wondering how exactly said technology would properly teleport sperm... but also wondering with @sj852 because from the 3rd picture it looks like he sees the picture of the other person... meaning it's not anonymous/unknown who he was with and "black/grey fox with black and red hair and purple arms/legs" is a fairly specific color scheme.
*apparently this comic is on Patreon, looking at artist's page on Furaffinity I found this upload: https://www.furaffinity.net/view/45624026/, so it looks like it is selfcest with portals... though I have no idea how it is set up world wise like if the other self is also in the same world?
Seems to me like this portal fleshlight technology is the kind of thing that long-distance couples would invest in, but The Guy's nonchalant deleting of The Girl's preggers-pic suggests something more casual, like this was supposed to be a one-night-stand or something. Was there REALLY no one closer to home he could play with who would insist he wear a condom? And why is The Girl only following this up 6 years later?
it's marked as "selfcest" on his page. I don't think they are brother/sister, I think it's alternative versions of the same person from different universes. Apparently the most economically profitable thing to do with portals between multiple universes is to fuck your alternate self, guess I would too