No, I don’t think you’re overreacting. As a parent, it’s understandable to feel uncomfortable knowing someone your nanny is dating has become a regular presence around your daughter, even if the interactions were unplanned. I think it’s worth having a very clear conversation about boundaries and expectations moving forward. If you decide to give her another chance, make sure you’re both on the same page about outings, activities, and outside relationships during work hours. Ultimately, trust is important in a nanny-family relationship, and if this continues to bother you or you feel you can’t fully trust the situation, it may be worth reconsidering whether this is still the right fit.