In the My Neighbor Looks Just Like Elastigirl game, the title says it all: you have sex with her, it's straightforward.
To Have and to Hold
My Naughty Daughter - Ch2
Blood Ties
Desert Waifu
Vicious circle
Riverside Cabin - Part 1
Bad Company
New Beginnings in Japan [Ch2 0.4.4]
Whorgwards
Into the Country
Northern Lights: The Beginning
Power Vacuum: What If... - Volume 3
Moana: Demigod Trainer Christmas
Forbidden Dungeon
Ryuko's Honnoji Adventure
NTR'ed by My Friend