Allyson's eyes widened at the suggestion the Veela made, having never thought about the amount of fingers her sister could take...it just never crossed her mind. "We could." she nodded.
Using one of her free hands on Fleur's free breast, she squeezed softly, before looking down to see Lisa's pussy and her wife's fingers going in. Seeing as Fleur's lips were currently taking over Lisa's other breast, Allyson used her free hand to play with the younger girl's clit.
Pushing another finger into her sister, she looked to her wife, waiting for her to put another finger in.
Lisa winced slightly, not used to having anything put in her as she had gone without sex for quite some time. Three fingers was a lot already.