WIT if it were me and I had the strength I would not call back. Just wait until the next conversation and see if he brings it up again. The question might be just temperature taking. Let him wonder a bit. One crumb is no meal.
As I type this I am laughing to myself...I can give better advice than I can actually follow through on. I take that back, I am good at ignoring the texts but have a hard time with the thoughts.
Me: 46 FWS: 36 Married and Divorced 4/07, Pregnant 7/07,False R 7/07 Baby Girl born 3/08 Kicked him out because OW: 7/08 5/10 He realized what he had and lost. Moved home! REMARRIED 3/14/11!!