What should i do? Please read !?

We dont really have a lot of money laying around.

I'm 4 months pregnant with our 1st child

My fiance literally want to either off work or go home after 4 hr from work every week. ( we work the same company and make decent money with over time hour ) when i try to stay or if i'm so tired i will make sure i have enough 8 or more hours a day.

He is irresponsibility, i see that, we argue but not much anything change.

Now he wants to buy a motorcycle. Actually every summer he wants to get a bike.

There will be no garage space for a bike

We will spend the money with we 've been saving for emergency stuff on the bike and its insurance...

I already tress with the new role and responsibility i will have to do when the baby arrives. I feel like he helps me nothing but tress me out some more with the financial problem. Am i too strict about letting he get a bike or i have the right to stop him? He makes about 200$/ week over me so he thinks he can off when he wants. We put our money together in the same account and some for saving.

Any answer will help. Thanks