Hi!
I hope you had gotten that legal advise.
In case you haven't, you may want to consider to set up a Ltd Co. Assuming that your partner is agreeable to this, you can pay her partly with shares in the company since money (or cash flow?) is one of your concerns. Or you can probably enter into a loan agreement over portion of her share (that you cannot pay in cash) to secured by a pledge on shares of the company.
But do get that legal advise suggested by Mike H.
