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Amber (Elaina form) is the cutest holo and I don't really care about the whole boyfriend situation. I've learned from reading H-manga that as long as your sex partner loves you, all the semen previously inserted into her body will be expunged over time. Even if there's a case when there's already sperm inside when your right in the act, your penis has been engineered to be able to scoop out these weaker male fluids and replace them with your own.
Let's get more serious and supposed she actually NTRs you and a child is conceived: in several US states, it's your right as a citizen to execute the child when this happens.
Looking forward for her streams and her forced ponkotsu personality to die off.
tl;dr: OWL LOVE