ME3 PS3: Two careers from a single ME2 imported character

Fun fact, you can create multiple separate careers in ME3 from a single ME2 career. They will be listed separately in the load screen so you can play them in parallel. I was wondering if they might overwrite each other since they have the same name for Shepard, but this appears to not be the case.

Context: I romanced Liara, but I also triggered the Garrus romance because I was curious if I could trigger the Paramour achievement post-Suicide Mission without replaying the entire game. You can't, but I ended up with my main progression where I romanced Liara and a branch save where I romanced Garrus, so I decided to launch both in ME3 because both romances are great. Also, this way I don't have to decide between playing Vanguard and Sentinel: I'm just going to play both.

I wonder if Liara will notice that I went for Garrus after doing her romance thing in LotSB.