Wait, so it is confirmed that he fckd his maid? Did I miss that?
It has been implied that he did the deed when he first got her ordered and made to his specifications. Otherwise basically it was implied anytime was possible between her arrival and before his first schooling.
Keep in mind, the attitude towards people having sex-bots/fully sentient machine in this universe is antipathy and/or ridicule of the person in general and neutral at best (really, nobody should care). In short, having sex-play with a robot doesn't count and Liam will remain a "virgin"
for a quite a while longer in the story. And yes, there will be more ladies introduced, but all of them will have their flaw(s) and/or simply not sexually appealing to Liam.