Hola Shirley

Great question! In this context, the verb "sospechar" is used to convey the sense of suspicion or speculation about what someone might think. The speaker is not stating a definite knowledge but rather expressing a curiosity or suspicion about the husband's thoughts.

If you were to use "saber" in this case, it would change the meaning to a more factual statement, indicating that the speaker knows for certain what the husband thinks. However, the original sentence seems to imply a level of uncertainty or speculation.

So, it's a nuanced choice based on the intended meaning. "Saber de nuestros encuentros" would suggest a straightforward knowledge, while "Sospechar de nuestros encuentros" conveys a sense of wondering or speculating about the husband's potential thoughts.

I hope this clarifies the distinction! Let me know if you have any more questions.

¡Saludos!

Silvia