Did Morinth actually think Shepard is strong-willed enough?

In Mass Effect 2 it is possible to recruit Morinth into your squad by
Killing Samara instead of Morinth during her loyalty mission (Only possible with enough paragon/renegade).
With Morinth in your squad you can choose to romance her.
Even though she is an Ardat-Yakshi (They kill people by mating) she says that Shepard is strong-willed enough to survive mating with her. She mentions the Prothean beacon Shepard survived in ME1 as proof. When Shepard agrees to the mating, it will still end with death.
Was she lying?
If she knew Shepard would die I can't imagine she thinks she can get away with it. She is on a ship in space, together with all of the other crew. With Shepard gone they would surely get suspicious and find out. No way she could escape in the middle of space. Did she actually think Shepard would survive? Or is she simply insane and didn't think about it? She didn't seem very shocked in the end.
I assume this just is a little flaw they didn't really think about, since almost no-one will actually make this choice.
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Can Shepard survive Morinth?
If you pick the "Surprise" or "You screwed up" Persuasion options, Shepard will successfully resist Morinth's influence and remain in control of their senses. You'll need a very high amount of Paragon or Renegade points to pick these. At this point Samara will arrive and fight Morinth.Is it better to have Samara or Morinth?
If you've resisted, choosing to help Morinth will provide a huge Renegade boost since she'll be free to continue killing mates, while choosing Samara will give a significant Paragon boost as you make the universe a little bit safer. Choose wisely, because whoever you don't help will die here.Can you save both Samara and Morinth?
The first thing that you need to know here is that you can get either Samara or Morinth loyal, but not both. Samara is a Justicar who upholds her benevolent code above all else, while Morinth is an Ardat-Yakshi who has been killing her mates due to a rare genetic condition.What happens in me3 If you choose Morinth?
The player had to choose to either kill her or Samara in Mass Effect 2. If Samara was killed, Morinth would join your squad in her place....Morinth.First AppearanceMass Effect 2SquadmateYesVoiced ByNatalia Cigliuti1 more row•Mar 14, 2012Mass Effect 2 - What Happens if you Choose MORINTH Over SAMARA? (Including Mass Effect 3 outcome)
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Images: Ono Kosuki, Annushka Ahuja, Barbara Olsen, Andrea Piacquadio