Remember the Prize: Jacob Discussion

Dalinne
That Shep hooked back up with Kaidan (this was a playthrough where I was looking through unexplored content so by the end, this is the story I saw with her personality and choices) since back in ME1, she romanced him because he took on her xenophobic view of things. Because he became his own person and not her boy toy, she turned to Jacob for fun only to find out in ME3 that he mattered a lot more than she expected. But after her bitter dumping by him, she crawled back to Kaidan because she was unwilling to go without sex for long and Vega was too much of a tease to wait until Citadel.
Mainly because I think Kaidan can do much better than her, I headcanon he gets fed up after the war and breaks up with her for good. She had been sleeping around with Kelly, the Consort, started a triangle between him and Liara back in the day and almost tried to have a threesome. So on top of her being a cheater, she was a raging hypocrite for hating aliens while sleeping with Asari.
As for the Shep who romanced Garrus, I pretend she was trying to joke around to hide her nervousness. Or edit it out for a more serious and less smirky version.