So Triss reasons are fine to you? Well, at least i think that no one would be ok with an amnesia advantage to take somebody's place in someone's life, the purpose on find the Rose, the forcing way to bed someone (rape, in other words, and this one i think that anyone should be ok), a friend betrayal and a lie (with the intention to make someone forget about a love) that could just help someone who is suffering memory loss.
Actually, i never tought too bad about this, but looking again Triss is really a "desperate to be with him" person

This just does not fell like real love, feels like necessity, possession... And there are people who say that Yen/Geralt is a toxic relationship, but a romance build on these lies and facts is what?