Finally, she knows that she's an 
unmarried 
middle-aged woman with 
no children, so she 
can't defend herself by saying that she 
has children, in order to say that there's 
nothing wrong for her to have 
lost her virginity.
This is probably why she keeps declaring that she's a "virgin", so as to 
try to save her "face" by 
stopping/preventing other people from thinking (even if she's 
truly a virgin) that 
because she has no children and no husband, she 
must have had 
non-marital sex 
several times with 
at least one or two men after her marriage with her ex-husband ended, 
whenever she felt very horny!