Unknown fact about Taj mahal

 We all know Taj Mahal as the symbol of Love .

Unknown fact you don't know about Taj Mahal.

1).  Mumtaz was Shahjahan's 4th wife out of 7 wives.

2). Shahjahan killed Mumtaz's husband to marry her.

3). Mumtaz died during her 14th delivery.

4). After her death Shahjahan married Mumtaz's sister.

SO THE BIG QUESTION IS WHERE THE HELL WAS LOVE ??