joint account problems

I have my own business. Im a dog groomer. On a good day I can make 500$ a day. Depends. 

Me and my girlfriend have been togather for 4.5 years. She's always wanted a joint account but I have always said no..

She wouldn't stop about it so I eventually just did it ..

When she doesn't work, she comes and helps me, and she only does the bathing of the dog , I am the one who does the clipping.

On the days she helps me, which is maybe 2 days a week or 1! Depends when she gets a day off. 

She wants me to put the whole money we make that day into our joint account .. 

but she hasn't put any of her money in it.

So then she said just put half of what we earn in that day in the account.

I just paid 700$ in bills last week and also this week I paid 800$.

Including the new kitty we got which is 650$ which I'm paying for. Plus I owe my dad 400$! I get paid cash if my clients don't put it in my account. 

She only gave me 300$ this week. 

She wants me to put in 460$ in the joint account and I tried to explain to her I still have the bills to pay for today.

And she made this big Argument with me.

I got so angry I cried.

She wants me to also put in 100$ a week out of my own money.. the days she doesn't help me.

But she won't put any of her money in? From when she gets paid from her job.

Please help me? Tell me what you think? 

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