Is sex w/ sleeping girlfrind wrong or does it vary w/ everyone?

Sex w/ sleeping partner was introduced to me by an ex. was performed more by me but i was waken a few times while she was getting on top of me. recently had new girlfriend in serious relationship(4 months, planning to live together, talk about kids in the future, more by her). we were having sex as often as she has had w/ anyone & had even waken up a couple times to finish activity due to be tired from round 1. there were no problems. 1st problem happened about 6 weeks ago. she crashed at my place though she had to work the next morning. i woke in the middle of the night & after not being able to get back to sleep started to sexually touch her & start sex. she woke up & was not happy about being waken. we talked the next day & she was unhappy because she was tired & exhausted the next day but that was it. i felt bad for not letting her get her rest. last week i crashed at her place. i took her out to dinner, we caught a buzz, watched tv, had great sex & crashed out. I woke in the middle of the night. i watched some tv in hope of falling back to sleep. i got back in bed w/ her & snuggled. rubbing her body & breasts(always did, mostly not sexual, massage like) she began to squirm & moan. i am thinking she's beginning to wake & getting turned on. she rolls to her back & half way spreads her leg nearest to me. i rub her body, breasts(nipples), thighs & she seems to be into it. i rub her crotch she's extremely wet. i eventually get inside her. since i had gotten mine last night i was not expecting another but wanted to get her off(she usually got off multiple times before i would get off during normal sex). i was shocked when she snapped up & not happy. she crashed back out & i did too. the next morning she extremely upset. i explained to her what happened & she told me she can't control what she does in her sleep or while dreaming. she also mentioned something about her past but didn't give details. i thought she was half awake. i felt horrible for upsetting her. over the weekend she broke off the relationship & feels that she was violated. she claims my second offense. of course i felt more horrible & a bit confused. i do regret it but feel like she over reacted & we should have talked in more detail about it as i never wanted to hurt or upset her. i have got oppinions from a few people(1 female) & they all say she over reacted. was told intimate issues while in a serious relationship should be talked out & handled privately. no doubt i feel like i made a mistake but most of my guilt turned to anger toward her because her reaction possibly over reaction) made me feel horrible about my self & ended our relationship. i researched topic on line & in a serious (sexual) realationship or marriage the topic varies w/ each couple. abusing & forcing is an assult. but seems many couple don't mind & even enjoy it. i feel like i should have know more about her past issues & she should have brought this up the first time she was angry for waking her in the middle of the night sexually. i still have guilt but feel she should have handled it differently. am i 100% wrong for what ahppened or a criminal?