What dose that mean?

Okay ladies so I’m not perfect in English and sometimes I don’t understand even when I look up, my husband was married another woman and it didn’t work out between them and they got divorced, after that we got married and she she’s been a stalker everywhere, Facebook, Twitter, instagram and everything, and she keeps sending him messages like (that bitch is ugly and why you left me and I still love you and so on) but the last one was (I know you both trying for a baby and I know that from what she keep liking on Facebook) 😒 and she sent (I curse your first born) what’s that mean please? And what do you think I should do?