my girlfriend grieving her mother?!

ok well, my girlfriends mum died about 3 weeks ago completely unexpectedly. she was the only family she had immediate or otherwise. i'm completely and utterly in love with her and she's fully aware of that and has been for two years, we were close friends. before her mum passed we were together for about four months but she decided she didn't love me. we were still very close for the 3 months between breaking up and her dieing. when it happend she reached out for me, i was the first person she called and she hasn't wanted to be separate at all. obviously i was fully there for her because i love her(generally looking after her, holding when she cries, making sure she's eating etc., so i really wanted to look after her and make sure she was as ok as possible and slightly selfishly i just want to be around her. since she has started saying she loves me. she has recently started grief counselling of some sort, think it's one on one. embarassingly despite the fact i pick her up and drop her off i'm not completely sure


well there's the tediously long back story out of the way (sorry about that i thought it might make a difference to the answer). since the funeral she has wanted sex so much, about twice a day and she gets it. i was wondering if that could be bad for her in some way, i would imagine it's escapism but, well, as i write this i can't see what's wrong with it but i worry about her it just seems strange. btw i'm 19 and she's 20 (and still lived with her mum when it happend) so if i'm being a complete spanner in some way go easy on me please, thanks very much if you can offer advice.

to clarify (hopefully) my question is could like having sex alot be bad for her mental health when she's grieving? does it show she's not coping? i don't know really i'm just worried for her

i wasn't going to say this but when i ask tihs in the UK bit people seemed to focus on the strong possibilty that she will leave me when she's no longer grieving, i like to think i genuinely love her not just love having her as my girlfriend so i'd like to say i am going into this with my eyes wide open and if she doesn't love me when she doesn't 'need' me anymore then i don't mind as long as i helped her at all. well actually i'll be devastated but i've decided i'd rather that than let her down when she needs me most.