Asking my PhD advisor for a postdoc position. Is it bad to appear desperate? I am soon to defend my PhD thesis in computational materials science. I have just two publications, which I believe is the most important reason for getting no response from postdoc applications. The lack of publications is majorly due to my initial slow productivity and subsequent delays from my advisor in manuscript corrections.

Earlier this year, my advisor said that if I am unable to find a postdoc position then I can remain as a postdoc in the lab after my PhD for 6 months and work on a different projects and publish the remaining papers. She also offered that alternatively, I can extend my PhD to next semester (till April) and look for positions in between (it's cheaper to pay for a PhD than a postdoc). I have already spent 5 years 2 months on my PhD. I don't want to extend it anymore.

Now, it's already November and I have no offers or responses. I am trying hard for any position. I am not sure if I will get one.

I want to ask my advisor for a postdoc position and want to let her know that I am desperate for an immediate position so that I can improve my CV. 

Will that look bad?
First of all, your advisor of all people really should not be somebody who you need to play games with regarding the state of your career (academic or otherwise). They really can only do their job (advising you, also in questions of career development) if you are being honest with them. In that sense, it shouldn't really matter if it "looks bad" - if your situation is bad they should know.

Further, your advisor already offered you a temporary job, and presumably they did so under the assumption that it would only be a fallback if you did not find a more permanent next career step. Now this situation has arisen - why would it be bad to take them up on their offer in exactly the situation that the offer was made for?