Hi raj welcome to the forum. I’m so sorry to hear about your father. Your mom is really a bold woman who is ready to take responsibilities at this age.
She is really beautiful and really has great assets.
Since she is 40+ , dont try anything trendy or funky. Just keepnit simple. Just make sure shebis presentable and confident. Snip of few inches and take out all the splitends if there are some. Get a u shape at the back abd keep the length upto mid back.
Hope so that she looks fantastic. 😊
Keep us updated.