First one sounds like Unemployed and High School Girl
Aww -Yiss, that's the one. Ty for the link and all too!
but the second is going to take more though.
Dang, Np i'll try to lay down some more info, it could've been a series for all I know.
I remember the older girl was an art tutor/teacher who liked taking care of her own looks.
She was a carefree and pretty lady. In contrast, her protégé was a typical shy, cutesy girl.
Much to the amazement of her friends/roommates, the adult girl showed signs of insecurity about her self after dating and spending time with the younger girl.
This bewildered her friends, as the grown-up girl was without a doubt much more remarkable than the youngie.
Being someone who's used to playing it cool, It got annoying for the older girl.
Just like her friends had wondered, what had she seen in her student and why was she jealous of her age?
It all kinda escalated after one jokey kinda casual date that the older lady agreed to go on with the girl on.
Anyway that's all I got. Beats me if it was sfw.