advice post-abortion..

should my exes parents know about the abortion? in a case where.. i’ve talked to my mom and she believes he should owe me at least something. as a part of his responsibility for what happened... and i brought this up with my ex and he got mad and blamed my mom for making me feel shitty and that she just wants money. but that’s not it at all. it’s just about the responsibility... and anyways. he refused to tell his parents and i just think if he’s parents knew he’d step up...? idk... advice ?