Just adding a few random theories into the mix for fun. Shekinah could have given Sarper a laundry list of reasons why and TLC just picked the reason that was the “juiciest” to air. She also never really talks about her age so it could also be a case of her deflecting from that convo. Or maybe she thinks Sarper wouldn’t accept “I don’t want to” as a reason at all. OR (this is my favorite theory) deep down she knows that Sarper isn’t a good guy and this is going to end badly just like it did with her ex and she doesn’t want a kid caught in the mix this time. In which case, good for her.