So if I have Karlech turn into a mind flayer and side with Orpheus, is there no option for me to ask Lae'zel if I can come with her?

I was able to get her to agree to not go with him, but it feels mean to ask her to give up her entire life's goal. Obviously if I was a mind flayer it makes sense for this to be impossible, but Orpheus would presumably be able to tell the rest of the Gith'yanki that I'm cool. I feel like riding off into the stars with Lae'zel would be the perfect ending with her, so it's a little disappointing it's seemingly not an option.