Me too I don’t get all these people wiping it up with tissues etc I never waste my cum I either taste it or spread it over my cock and balls or my neck and chest leaving it to dry. Quite a lot goes on my wife and sister in laws panties and bras.
Yes, its great to have a beautiful wife, and even better to have her beautiful sister. Especially when she just turned 18. Her virgin pussy will be great to fuck, it will be painful for her, but your wife will take care of her. You just have to dig her pussy. Your wife will clean your cock, make it wet and insert your cock in her sisters pussy. And on the first ever sex, she would encourage to cum inside her pussy.