Is a Real Estate agent allowed to "invest" in their Seller?

[Kenneth Bradarich]

Let's say I'm the licensed Real Estate agent, I have a Homeowner/Seller who could use $10-20k to fix up their home for a better selling price. By law, am I allowed to provide the money upfront? Is there anything, by law or equally serious (not including a poor investment), preventing me from doing this?

Couple notes:
1) I will obviously be asking for a negotiated return

2) This is a normal Agent/Seller relationship in that the homeowner remains the homeowner, with the added caveat that I am fronting the $20k