invitation wording

Is it horrible if we list Aaron's dad on the invite but not my mom (who I haven't spoken to in a year and will be lucky to even be invited?)

On our invitations, Aaron and I listed his father as host but not my mom. I haven't spoken to my mom in over a year and she'll be lucky to be getting an invite at all. However when I sent my sister the proof to show her what the invites would look like, she freaked out. I know technically it should be who is paying for the wedding - us - but we couldn't figure out a way to word it,so that his fathers name was on there but didn't draw attention to the fact that my moms name wasn't.

I do NOT want to put my moms name on there at all. I understand why Aaron wants his dad on there - he's the only child and his mom died last year and his family means a lot to him. I love his dad too and I don't think he should be deprived of being on his only son's wedding invitation just because my mom is a raving lunatic. That being said, when talking about wording, I didn't want anyones name on there but our names. Aaron got upset because his fathers name wasn't on there. So we changed it to what we have now. I just don't want anyone in my family to be mad at me for this or to give my mom and my fuel to use against me so she can further make herself a martyr for why I'm such a bad daughter.

We already approved the proof sent, but the invitation place said they could make changes for $5. I'm inclined to just let the wording and just ignore what people say and let them think whatever. Anyone who knows me should know was a volatile relationship my mom and I have.. and I don't really care to hear anymore ... but she's your MOM!!!!.. whatever. I'm past the whole being nice to her because she's my mom and letting her treat me like crap..