> definitely she does.

That's not scientific.

That's not a double-blind experiment. Your may be more attentive to her mentions when you've secretely switched on the wifi. You may behaving differently and she may be picking up clues from your behavior. etc.

If you really want to be scientific, you need to do at least n=100 experiments to detect a 10% bias at 95% confidence level. (Z=2 E=0.1) [0]

If you detect such bias, your wife may be able to earn $1M prize for her supernatural abilities. [1]

[0] https://en.wikipedia.org/wiki/Checking_whether_a_coin_is_fai...

[1] https://en.wikipedia.org/wiki/One_Million_Dollar_Paranormal_...