Is it normal to have these urges for my mother?

I think its "normal" for people to have really inapropriate and disgusting sexual fantasies if they are a victim of childhood sexual abuse.

So the feelings themselves arent normal but it would be weirder if you were fine after being molested by your mom.

Please get help.

It was this way with me; I am from India and I am a Hindu [I give you this info as I want all to have a clear understanding of my position] my mother was very strict with me since childhood but doting towards my elder brother. Since I got to 15 years of age her behaviour suddenly changed towards me. I don’t know what the reasons could be but I guess one on them is that my elder brother is a good for nothing spendthrift. My father works in the BSF and is out station for most of the year. It was also during this time that I started earning a bit. Whatever the reasons her behaviour changed drastically! It started with smiles & nice talk and gradually shifted to frequent kisses, hugs and sometimes massages. All this I never got during my childhood so I was taken aback but then I saw that her affection was a bit different than a mom son relationship entails. Like I notice she lip kisses me often these days instead of pecks on my cheeks, also during massages she tries to, how do I say do more than just massage, like if she is massaging my belly her hands travel a bit too low for my comfort or when she is massaging my leg her hand fondle my inner things right up to my lions! Like a couple of days ago she came to massage me in a bra and petticoat, you can imagine the situation as I was in my underwear only [she insists on it during massages]. She also makes me massage her sometimes or calls me to the bathroom to apply soap to her back. All these were quite ok for I live in India where mother and son are supposed to be intimately close. In my creed Hinduism mothers command is considered more pious than even deities and must be followed at all costs. Hence I carried on but of late even I am uneasy as I sometimes get the hots for her due to her conduct. Like few days back she was talking about my GF and subtly turned the topic towards my sex life. I have to admit I was aroused by her talk and expressions, don’t know why I talked in such detail with her about my sex life, even describing my sex acts with my GF to her! I am myself very surprised on my act. She ended by hinting “if you need any advice or otherwise need any help in this matter I can help you after all I am more experienced in this matter” She smiled slyly and said I need more practice and maybe she can help! I was dumbfounded and she walked away giving me a smile.
Please help me am I reading too much into this or is there something wrong?

Ok, listen, the feelings you have are far from 'normal'. But it's not entirely YOUR fault. Your mother made some bad decisions, exposing you to her sexual lifestyle at such a young age and allowing you to feel unsafe around her bfs, stole your sense of a Mom and replaced it with a woman. One thing you didn't touch on, was if seeing her with other men made you jealous. If it didn't, you're not entirely obsessed in an loving/affectionate way, it's solely a sexual perversion. This means psychologically; when your mother should have been motherly to you, she had her own life and neglected responsibility as a parent. Her being risqué around you (during your years of puberty) were probably your most pronounced sexual memories/first intense arousals.. and what you now associate sex with. Incest. This can be 'fixed' - but you are indulging your lust as opposed to solving it, with help and therapies. Your Mother didn't 'mother' you. Thus making your connection sexual instead of a normal relationship. If she'd 'babied' you/taken proper care, you'd just have been a "Mama's Boy", in a healthy way. Everything a parent does, especially in formative years, effects a child. Sexuality was just too prevalent in yours.
What you can do is get a new life going for yourself if you WANT. But do not destroy your mental state further, indulging fantasy that is very wrong. You're not 'wrong', the act is. Sexual trauma happens to a lot of people, but it's your choice to move past it and confront demons.
Do NOT attempt to force your mother in a sexual-black-mail, you're destroying her, mentally, as well (two wrongs will not make a right) What she did was wrong, but she didn't have sex with you. You are now becoming predatory/instigating at nearing 30 years old. You have a sad past, but "In every second, is another chance to turn it all around." Please work through it.

Your mom was cruel to confuse you that way! Women who lead people on like that are disgusting. Don't give up hope. I woukd go see a therapist.

What she did to you is considered to be a form of sexual abuse. You should consult a therapist specialising in sexual abuse.

Man... That is fucked up!
Terriblyh sorry to hear you have cancer! Hope therapy will help. Hope you pull through this.

As for the mom-thing. She is your mom. Even if she did act all slutty, she is the one that brought you to this world. Don't act on it. Love her, hug her, kiss her cheeks. Love is one thing, but sex is another.
Don't mix up the two. And if you are 30, shouldn't you have a wife, or girlfriend.
I highly doubt it that you find your mother more attractive than your girlfriend/ wife...