There's a new short novel at the BE Story Club called "Pranked With A Kiss". It's about a lipstick formula that causes those kissed to experience extensive breast growth. This results in, among other things, the desirable state of affairs wherein women are making out with other women as their breasts grow to tremendous size.

Here's a sample:

The girl moaned as her chest began to expand, nipples becoming noticeable underneath her shirt. As the girl closed the door, another moan sounded from a different corner of the hall, prompting Bernie to turn as Jess found herself with a different test subject, the raven haired girl’s swiftly-expanding breasts beginning to leave her with a very uncomfortable sports bra.

It's by Echo Wing.

[BE Story Club]