Do you see her often? if not why?
Do you talk much (idle chit chat or "proper talking")?
How is she with your kids?
Do you do anything? ie go out for a meal or anywhere really.
Do you ever argue?
Does she ever help you out in any way, or offer to?
How do you feel about your mum? do you think she's proud of you? does she show you affection?
particulary interested in lone parents opinions, but the more the better!