I feel like this demand would normally be given more context, rather than the first she says on the matter being "Come on, make me pregnant!" as if it should be the most obvious thing in the world. Is it standard practice for dragon slayers to fuck said dragons after they create a new body or some shit? And if she has the power to shapeshift, why turn into a human and not an elemental tail or other similar animal?
...I guess the answer to the second one is pretty obvious.