Answer
The answer to the question is Avoiding.
Explanation
If we look at the question, the mom asked Guy to take the call of Mark but Guy asked her to say Mark about his absence from the home. Although he was present at the home. Actually, he didn't want to talk to Mark anymore and avoid from him. In the question, "Mark again" also showed that he might make him call the second time at his home and share their ideas or talks before. It might be a reason for the Guy to talk his call no more.
