That has to be THE most dreaded issue, her having feelings for her lover, enough so to cause uncertainty. I imagine you head floods with thoughts and all sorts of wrong conclusions and wild scenarios. This where I've observed here that it takes a very smart and sensitive wife to not lose her sense of reason. A smart wife considers the implications and understands the freedom she has. Ultimately she's the one that decides if she wants to get fucked or not and if she wants to risk getting pregnant. Not all women are up to managing that well.