B2 visitor visa extension for mother in law

[bins]

My mother in law has a 10 year visitor visa entry permit to the U.S.
She first visited the country in 1999 for 6 months. Later on she visited in 2002 for 6 months during which we applied for another 6 month extension which was approved. This year she arrived in May, again on a 6 month visa. We plan on applying for extension. My questions are:

1) When should we apply for extension? Is there a waiting period before one can apply for the extension?

2) What are the reasons we can give in order to apply for extension? Can we cite reason as "coming for child's delivery" as a possible reason for extension?

3) Since we have already extended her visa once, is there a chance that her visa extension will be denied?

4) Can someone send us a sample letter citing reasons for extension?

Thank you for your help.
BD

 

[GCChaahiye]

If you keep on extending her stay in the US beyond the initial 6 months, she/you are certainly going to land into some trouble later on. She might be refused entry into US the next time she arrives and you may have a potential problem incase you file for Green Card.If you already are on Green Card, there may be a potential problem when you apply for citizenship.

It is always the best to leave within the time allotted without extending.

If you mention that she needs to stay here for "child delivery", it is certain to be denied and her jeopardize her future entry into US.