I am assuming she is getting paid on her personal name from OF. In that case, I am pretty certain there is no deductions that can be made for personal income as the structure to manage her should have been created long before even starting.
Residency planning,
tax planning etc... It has to be managed as a real business not like some side job.
If OF paid her out a total of 35k, and she is a tax resident of
Spain then yes of course she will be liable for tax on the full amount in Spain, which has a terrible tax rate. Ideally, you should have set up her tax residence in a lower tax EU country, if she has EU
citizenship it would have been quite simple, and in that case you would have kept more of the money.
She will need to pay tax on the full amount OF sent her, and the portion (
crypto) she sends to you can be seen as a gift, if you would like to classify it that way. I don;t know the gift laws of Spain.
Eventually, cashing out the
crypto to fiat you will need a source of funds. You should have created a company whereby you can send her an invoice for consulting services to be paid in crypto or
cash.
In general, there should have been a better structure in place to avoid this problem from the beginning.