Are you sure that it's real hair down there? Maybe she was using a barbie doll as a dildo and accidentally left it in there.
Don't laugh, it's happened.
At a nursing home I worked at, this sex crazed old women with alzheimers was constantly shoving stuff up there, including, yes, a Barbie doll.
When she kicked off, they were stripping the bed linens and found a beheaded Barbie twisted up in the sheets. Head, never found
I should be telling you this with a flashlight under my chin, aimed upwards.
Gargamel, it might just be a mouse that's latched on to her mons pubis.