What should I do about abusive ex and child?

[yellowbricklane]

Hello all,

I don't know what to do.

My abusive ex regularly calls our 13 year old son. But I believe he does this to track me. I have let it go and he frequently calls DS during the night (around 9pm) than during the day. Last night, DS put his dad on speakerphone and I was eavesdropping. DS dad was asking DS where "mummy was last night" and if I have been out all night last night. He then told DS to let him know whenever mum has gone out.

I immediately called DS dad and told him that it's unfair what he is doing to DS. That his concern should be on his child not on my whereabouts. He then threatened me that if I meet anyone else or have my lesbian adventures again that he will fuck me up. I am in despair. I just don't know what to do.

Block him from ds phone and speak to the police

As per @Theunamedcat

Please report his threat to the police. Even if they won’t act on it, it needs to be on record.
Could you have a solicitor write to him ?
As PP says I’d block him on DS phone, could you have a cheap burner phone he can contact you on, by text only?
Also check he isn’t tracking you by your phone.