I am far from an expert but I would think this is okay under the right situations. I think maybe there could be distortion in emotional attachment with sexual intimacy if this became something you did regularly, but that doesn't seem to be the case. It sounds to me like you used it creatively to deal with a particularly stress situation and that you have other more dependable coping skills. You probably will want to follow up with your therapist and discuss it further. I would be interested in why this is bad, because I just don't see in my uneducated mind why this is something she would frown on.