Actually now I'm curious. Are there any poly/more than one relationship mods? Cause I really want to do a replay as engineer Shepard and romance both Garrus and Tali
Man I wish there were. I've actually heavily looked into this because... I mean, same! I play as an Engineer Shep and want to romance Garrus and Tali.
Currently, there are no mods for LE that allow poly/multiship romancing. RIP.
.... That said, you COULD probably pull off 'experiencing' two (or more) relationships in one playthrough using the Trilogy Save Editor mod! Effectively, by using the save editor, you could manipulate the relationship points in the game files to allow for both.
That said, I haven't yet tried it myself (though I've considered it) just because it'd go a little bit sideways for the same-gender romancing. I think if successful, one of them would refer to you with the 'wrong' pronouns in Tali & Garrus' case (depending on your base chosen gender in game. Since the active game, unhacked/unmodded, refers the romance lines only to the officially dialogue-linked lines, so Tali would refer to a BroShep while Garrus would refer to a FemShep). The mod creator seems interested in feedback for anyone who tries that sort of romance work (especially with LE3) so you could always post about it in the Nexus forums if you try it out~