It has been happening in bengal before didi came to power. You get this impression because didi has been able to earn the support of the muslims who have now become didi’s right hand. Didi or no didi, the thing is that under didi it would continue to happen more openly without any opposition. Copulation between hindu females and muslims males has been happening from thousands of years.
It happens in almost all the states, like in other states some of the incidents gets highlighted in the news when a hindu girls goes to musalman guy or elopes with him but in spite of the opposition and controversy she goes with her musalman lover in the end.
In West Bengal it happens more one reason being more musalman population which is also because it shares border with Bangladesh another reason is that Bengal is a kind of Indian bastion of feminism and women’s rights. There are many bengali hindu women who are intellectuals and hardcore activists who continue to inspire bengali women. So more bengali hindu females exercising and asserting their rights and freedom by grabbing and riding more masaledar, harder and bigger circ musalman lund, maintaining peace, harmony and upholding liberal values that many people associate with Bengal.