Shocking Introduction at a party...

Shocking Introduction at a party...
.
.
One man to another ..
Meet my wife tanya ..
2nd one : ya, I know her.
1st one : how..?
2nd one : we were caught many a times sleeping together.
1st one : Wat??? Angrily.. What the hell u r talking..??
2nd one : during lectures in science & history classes.
We were classmates.