Just lube.
I would be curious, but certainly ask away.
I do love watching my wife getting pounded and just letting loose and loving it.
From the beginning I would tell Naomi that it was a good and sexy thing to be a slut and to let it out. She quickly learned to embrace it and feel sexy about it, first with me then eager to be shared at parties and guys, then all BBC and sending her on dates. Naomi then began really liking and being turned to being seen with her BBC dates in public and being that hot blonde slut.
Naomi loves to pull her legs back with heels in the air, just perfect to take it deep.
My wife and I both enjoy our kinky games including when she returns home from a BBC date and me reaching up her skirt to feel how soaked and used her pussy is.