Oh I agree! I've watched a few of this couple making love, having sex or simply out and out fucking in the woods and each time she's either pulled away from him when she thinks he's close or he's pulled out of her. It doesn't seem gentlemanly to bring yourself almost to that point of no return then pull out. Although she looks like she can take care of things, perhaps she isn't on the pill and they can't get condoms. It might be that like you say, she doesn't want to feel cum leaking from her loose cunt as she walks back to the house. There is the chance that she isn't his wife and arriving home leaking cum down her thighs just wouldn't be good. I both enjoy sex under theses circumstances and video clips of these events.