Sheer Coincidence?

I had the runs last night. Didnt eat anything funny; so many times that my legs turned weak. Shall leave out the grotesque details. I was wondering what caused it. ...
Today, for the whole day, I was trying to call my wife in Lijiang. I smsed her, called her but no response. It was only 5 mins ago that she called back home, saying she was running around the whole day and she had the runs. Is it mere coincidence? I always seemed to feel what she feels when she is pregnant: the nausea, cravings and now the runs. And she was describing her condition, so similar to mine. But at least she had a valid reason; she is in China and they had steamboat (potential since you mix cooked and uncooked).
Well, fortunately she is fine, and so am I. Glad that she is returning tomorrow...