We had the opposite effect. When we got back together, we couldn't control ourselves. We ML almost every night and went out at least 1-2 times a week on "dates". It was more passionate than when we first met in our 20s.
Our sitch was drug out for a year though, so maybe you weren't apart long enough.
Me: 43 W: 37 Together: 18 M: 15 D: 8 yrs old ILYBNILWY: March 2011 She Filed for D: August 2011 She moved out: Sept 1, 2011 Reconciled: May 2012 Divorce Case dropped: July 2012