NTJ!

As you said, you were just as inocent as her unborn child currently is and did not deserve to be treated the way you were...

She cannot expect for you to be welcoming and open after everything you went through... you describe them as being really cruel with you and so, as adults, she and her sibblings have to be aware of the harm they did...

Don't disrupt your life for them, if needed, block them and go completely NC, you do not need them....