Surprise 3rd baby but SO doesn’t care

My SO wanted me to abort but I didn’t.

Our now infant will be 17/18months when next baby is born.

Our relationship hasn’t been great lately. All he does is sleep, watch tv/play video games and go to work.

No help with the 2 kids already here. No help cleaning or anything.

He can barely pay his rent or any of his bills.

I thought we could work things out but it’s looking like that’s not going to happen...

He hasn’t even asked when the next baby is due or how I’m feeling.

We moved in with my parents in Sept.. it’s now Jan and he still hasn’t unpacked.

His boxes and bins are making it hard for me to live. I’ve asked numerous times for him to help out with normal household chores and the kids, clean up after himself, provide money for groceries and things the kids need.

Nothing.

He got mad the last time and said he’s going to just leave and quit his job and move back to his parents house. He said he doesn’t want to be around me because I’m always annoyed with him.

I felt like I owed it to the kids to try and work things out but he’s such a horrible role model for them... I want to ask him to go.

I’m scared he’ll try to take my baby I’m breastfeeding to his parents (who are nasty towards me and there’s a history of abuse in that house).

I’m feeling lost. I just wish he would disappear.

He has always been lazy and messy but now it’s just beyond. If I asked him to do something he’d do it but after the baby was born things just went downhill and he has completely changed. The fun to be around happy guy I fell in love with is gone. I’ve had many talks with him. He was hiding financial debt from me which someone else told me about. He avoids having to do anything and even though our bills are 1/3 what they were before he never has even 5$

I had my first before we met and he was super helpful. It was great. He was great with my son. He was always a bit lazy with house chores but if I asked he’d help. Our second is only 10 months. The first few months he was great. Then he just stopped... we literally have had sex like 3 times and I was shocked I even got pregnant as I had been labelled infertile and had treatments to have my second. I’m shocked about his change in behaviour, attitude, treatment of me ... it seemed to just come out of no where. Then someone from work called to tell me he owed someone 10k and was hiding it from me.

I took off my engagement ring to make hamburgers the other night and haven’t put it back on... he hasn’t noticed...