No contact with dad (who is penniless anyway)
DM has had to sell her house as she was on an interest only mortgage and thought that a critical illness policy would pay out on turning 62years of age (DM insists this is what she was told at time when taking out the policy).
It didn't pay out and she was in the position of owing over 40k which is now just about to be paid back from the sale, thank goodness, but she will only walk away with around 65k profit which is not enough to buy in this area. She has taken a council flat and is spending money on carpets/wallpaper etc etc to make it comfortable and is adamant that she'll stay there for good and enjoy her money, fair enough, she's not had an easy life, and cannot cope with maintaining a house on her own and will be retiring in a couple of years so money will be extremely tight.
DM has never been good with money and I am slightly concerned that she'll fritter it away but it is her choice to do so I guess!
Myself and Dsiblings will have no inheritance, fine-such is life and not everyone does
DB (older than me) owns a lovely big home and his wife and him have lots of savings. DS is just about to buy a property with her husband, and both have just had promotions at work so money is not so much of an issue 
I however am still renting (31yo) and have a DC, no partner and no financial support from exp but that is a whole other thread (and he can get away with it because he has made himself self employed so no chance of ever getting any support there).
I work mon-fri 9-5 in a job I really enjoy but have no savings and no chance of ever having any unless I miraculously land a much better paid job (promotion in pipeline but not guaranteed). I am genuinely very happy for all my friends who are all married with lovely homes those who are not married still all own their own homes, but I do feel sad very often that I don't/potentially never will own my own home. I didn't save when I was younger and that was my downfall but since having DC I've never been in a position to save.
The house we're in now is a private rent but it doesn't really feel like home despite being here for 4 years now. I find it very depressing. I just want more for me and DC and to be able to do work to out home and feel proud that it's mine
Aibu to ask DM for a deposit for a house? She doesn't have a pension so will be relying on state pension when retired so 65k is not a lot to keep her going. I feel awful even thinking about asking but it might be the only opportunity I ever have at owning (even if I was to save now I would be into my forties by the time I had enough for a deposit)
I would even pay her it back somehow, I just don't even know how to broach the subject, and no offence to my mum but I don't think she'll be over then moon at my asking 