You seduce her

You have always been a butt guy and this woman's is irresistible.
"Lets begin with a lab," says Roxxi. When she leans over to pick up the papers you lose it. You reach over pull down her pants, under which she had on no panties, and started rubbing her ass.
"What the hell are you doing?" Roxxi exclaims. You don't care about her rejections, you just pull down your pants and fuck her up the ass.
"God I love you Roxxi," you declare.
"Well I don't love you!" she yells. Nonetheless, you keep fucking away, in fact you never stop. For the next several years you keep fucking her butt never stopping. She eventually has to continue her life hoisting you everywhere, but whatever, you're happy.