You want to watch your partner absolutely devour her pussy, fingering her and whispering how hard he is thinking about fucking her as he looks right at you and sucks her clit deep, never breaking eye contact as he climbs up her body, sensual then rough, teasing then manhandling her as you see her press into him knowing she's feeling what you aren't - him filling her up. It makes you drip and you can't get enough of it.
If this interests you, we should get to know each other.