OC of @sepiascribe on Twitter. Changed a bit from the WIP. Technically Lass has had at up to at least 6 breasts before, but I stopped at 4 so I could spend more time making them look good, and avoid rearranging everything to fit in the last set.
Of course I have drawn very little multibreast (in fact, only one previous piece I can think of) and I don't intend to make it too regular of a practice, but it's fun now and then.