if your lawyer say can buy directly from her without any problems should the husband turn up later...then i think ok to buy kua...
whatever it is...go through your lawyer and ask properly...don't ask us because we're not legal professionals and not really suitable to advise you la...

but if you're afraid of ah long kacau next time, that one also could be a non-legal related problem for you la...this one is up to you to take up the risk dee...you can explain next time if the ah long kacau...say you're the new owner and u know nothing... then after that dunno how lor...