You tease her...

As you realize just how desperate she is to get your cum, you grin and chuckle, "Oh really? So you need my cum, is that it?" She nods, "Yes! Please! I'll do anything to get your seed!" Taylor's body is now talking, despite her mind being of the same desire in this moment. You grin and really start fucking her nice and deep with long, languid strokes, "Anything?" Her head whips around and she gives you the look of a woman possessed, "Anything."

You grin and a wicked thought comes to your head, "I want you to tell him the baby is his so he can raise our child." Taylor stops bucking for a moment. Beyond getting knocked up by you, she hadn't thought about what comes after. Surely she isn't going to cuck her boyfriend like this. He deserves better, "No. I-I won't do that to him. I'll break up with him and we'll work something else out." Taylor's mind is back in control. Despite how badly she physically wants to get knocked up by you, she has morals.

You smirk, "Would you rather care quite a bit less about your boyfriend than you do now and get off on cucking him, or have him catch us right now while you can say nothing to him except how much better I am than he will ever be?" The question is simple: keep your morals but be forced to act out your cuckold fantasies, or join in on the fun?