Missionary! My wife and her boyfriend are very much in love which I'm ok with, love makes for much better sex! I love to watch them kissing lightly but deeply as he is slowly thrusting his cock into her hot wet pussy, making sure his whole length is making it into her. They continue to kiss with passion as he places his pelvis against her pelvis and thrusts with a grinding action to be sure he's stimulating her clitoris. After quite some time (he's a long lasting lover unlike me in the past) she'll have a huge orgasm and he'll start to grunt, his large balls will pull up and his cock starts to pulse as he's pumping his sperm deep into her tubes - so so lovely to watch these two make love!! I always find myself wishing he had been her lover right from the night we were married (when she was impregnated with our first ......).