So, for context, I (36/m) and my mom (55/f) don't live together, I live in an apartment on my own. We live about 25 minutes away from each other, sometimes my mother likes to make surprise visits to help me around the house or to cook something for me when I'm busy with work. Yesterday she came over to help me cook and clean cause I had a lot of work on my computer. While she was cooking she said it got too hot in the house and proceeded to take off her leggings and shirt, and was cooking in her underwear and bra. I couldn't take my eyes off her, and I'm pretty sure she caught me staring at her ass while she was running around in the kitchen. I've flirted with her numerous times and she always told me to stop, never reciprocating the flirting. I know she's horny cause my father and her don't have sex at all and are barely on speaking terms. There's nothing I want more than to fill her up to the brim and keep it going for as long as possible, but I don't want to ruin our relationship as mother and son. Any tips?