I'm sorry to hear about your's diagnosis. This must be a stressful and tough time for both of you. It's completely normal to feel helpless and unsure of what to do. It's important to remember that emotional support is just as important as medical treatment during cancer treatment. Here are some suggestions that may help you comfort your wife during this difficult time:

1. Listen to her thoughts and feelings: Active listening is an essential aspect of emotional support. Pay attention to your wife's thoughts and feelings. Let her talk about her fears, hopes, and concerns without judgment or interruption. This will show that you care and that're there for her.

2. Offer practical support: Cancer treatment can exhausting, both physically and emotionally. You can support your wife by offering to help with daily tasks such as cooking cleaning, and grocery shopping. This will free up her time and energy so she can focus on her recovery.

3. Attend appointments with her: If your wife consents, offer to accompany her to her appointments. This will show her that you're invested in her care and that you're there to support her every step of the way.

4. Encourage her to seek support: There are many support groups for cancer patients and their caregivers. Encourage your to seek out these services to connect with others who are going through a similar experience. This can be a great source of emotional support and can help her feel less isolated.

5. Take care of yourself: It's important to remember that you also need to take care of yourself during this time. Make sure to take breaks, seek support from friends and family, and practice self-care. You cannot pour from an empty cup, so ensure that you are supported too.

Remember, everyone experiences cancer differently, and there may be times when your wife wants space instead of support. Respect her boundaries and let her take the lead on how much support she wants to receive, but always make it clear that you're there for her.