Harsh? I think the sexual relationship with Clark is central to their relationship. Martha wants to be with him. Is it more than sexual? Yes, she would want an emotional relationship with him. But he doesn't really want an emotional relationship with her. Yet, he would like to protect her from the worst KGB outcomes?

As for Clark, he resists children and living together...she might be suspicious of who he is and what he wants. And, she might be suspicious of how much he wants to be with her emotionally. Martha, beware.

Still, Martha has a gun.