Is it just me or do i really think the grandmother is a whore i mean really!! At her age.....

I do find the grandmother in this manga kinda annoying, but...
You know, people can have romantic and sexual feelings no matter how old they are. For example, I have this female
relative who is 70 years old and has a boyfriend. Or do you think that old people should just not do anything but wait for death?! o_o

I doubt this is sexually motivated. It's a trap! (it's always a trap . . . .)

I agree with blackcobra, she wants her grandbaby to fight for what she wants.