IRL sex had the plot device already set, Asuna knows about the others chicks, anything about Alice or even Sugu will be a excuse now you can tell the way she dissmiss Liz help with Kirito, she will be suspicious about anyone, and since she is now FOG broken that will lead to her be less cautious about Kirito, what could be a problem for them, so she already said" if this continue she will get addicted to Inodas dick" she will want her fix even IRL