Maybe you're the dominant one, ordering your own mother to her knees, making fun of her for being such an obedient little daughterfucker, teasing her about how she's so addicted to her own daughters cum she'll submit to you without hesitation. You make her get on her knees and wait patiently, cheeks flushed red with embarassment as she tries and fails to look at anything but your cock pumping in and out of your grip in front of her, until you finally tell her you're cumming and she involuntarily leans in, gets her mouth as close as she can so she doesn't spill a drop as your girlcum oozes out and drips off your head and onto her tongue.
Or maybe you're the submissive, and you dutifully obey her as she makes you milk yourself into her mouth, extracting her favourite treat as she laughs at how excited you get whenever mommy lets you touch yourself around her. Maybe she scoffs at how her pathetic daughter is so scared of other girls that she hides at home and jerks of to her own mom instead, at how you let yourself be used by her because you're just so fucking desperate to make her proud.
Maybe you're a different kind of dominant, dispassionately grabbing her in the kitchen and pushing her down to her knees without a word. You don't bother meeting her eyes as you fish your cock out of your panties and start jerking off, watching some depraved mother/daughter porn on your phone rather then paying any attention to your own needy yet obedient mom below you. You're not even using her to get off, just to avoid the mess by dumping your load into her mouth, and as you cum that's exactly what happens. She carefully catches everything she can, and before she even has a chance to thank you you've tucked yourself away and gone back up to your room.
Maybe she's a different kind of dominant too, treating it as something so matter of fact that it hardly even seems sexual for her. She sees you have a problem and it's her duty as a mother to take care of it, so she walks you through the process and talks about technique from her place down on her knees, reminding you to think of things that get you all excited, and giving you quick glances at her tits and down beneath her skirt to help you get off over her. She tells you you're doing a great job as the first spurt of your cum hits the back of your throat, and she reminds you after that she's here for you any time you need.
Maybe you're both just curious. After she caught you jacking off to some old family photo last week you've had a talk, and both admitted your unexpected mutual interest. You're both somewhat shy and nervous, and you both can't help but break in laughter a few times as you go, but you stare down at her as long as your anxious gaze will let you and she tries to do the same, while between the two of you your hand works back and forth along your shaft and slowly builds you up towards your orgasm. She doesn't even mean to taste it, but as you cum across her face a little drop lands in her mouth, and in the moment she goes in to catch a little more.
There's so many ways you can jerk off in your moms mouth today. Go ahead and give it a try <3