At the moment she hears your request, she is likely to crinkle her nose in mock discust, or even outright say something like "oh GOOD LORD, that is so inappropriate for a woman my age" or "you are such a pervert".
JUST EXPECT THIS but don't let it sway you! Don't let it frighten you into thinking that she will refuse you. She won't! She just isn't adept at being outwardly sexual so it makes her uncomfortable, but that doesn't mean she won't do it for you, and more importantly, she will actually LIKE it on some level, trust me!
Just ignore her attempts to poo-poo you, and allow her to express this without it making you back down or "feel bad" for making her do something she doesn't want to do.
She DOES want to please you, so keep that in mind!
