Wiring money abroad temporarily

I need to wire about $50.000 temporarily to my mother abroad so she can show liquidity for a bridge mortgage loan as she purchased an apartment and needs to sell her house.  The bank over there requires an extra 10% custion to approve the bridge loan. I've been informed that is standard procedure. She will return the $50k after the bridge mortgage loan is approved.  I want to make sure it's not considered a gift both ways.  What best to do?  Make it a loan? (can we do the signing retroactively or before wiring?) --- thanks in advance!