If these angels were merely manipulating matter (vs. somehow taking on real material bodies), the notion of "lust" wouldn't even factor in, as lust requires the interaction between the matter and the spirit, where the material could cause a reaction in the immaterial (generally the lower, sensible nature) ... unless somehow theirs was a purely intellectual "lust" of some kind, vs. the normal human lust caused by concupiscence in the lower nature.
There's nothing hypothetically that would have prevented God from creating a being that was halfway between angel and human, where they had their spiritual higher faculties, and then also sensible faculties, with the difference being as their bodies were optional, where they could assume bodies and have them interact with their lower/sensible faulties. So for them having a body would not have been essential to their nature, and yet they could assume real bodies if they wanted to.