Ty realized she kinda wanted her own lover who'd fuck her while Eileen was fucking his, since she kinda missed getting fucked and bred. A few seconds later, she saw a pair of hands belonging to a young man reach to cup her breasts, and felt a hard erection rub at her ass.
Her newformed lover walked her to the window, pressed her against it so her breasts rubbed along the cold glass, and shoved himself inside her, making her moan as his hips began to thrust rapidly in and out of her. This man's cock felt distinctly different to Eileen's- not as thick or large but more youthful and eager, and it hit at her inside in a totally different way. A way that felt so fucking good.
All of a sudden she noticed Eileen's eyes notice her, and her eyes met his, both of them continuing their lovemaking while gazing at one another. The implication was clear- they might want to have each other's children, but they wanted to mate with other people too. Their simultaneous pleasure was intoxicating and intense, and both of them moaned sluttily as they approached their peaks.
Ty noticed what Eileen was doing to his nanny, and decided to wish for his lover to emulate Eileen's motions. Sure enough, one of his hands reached between Ty's thighs and stroked carefully at her clit, while the other moved up to pinch one of her nipples while the other pressed firmly on the glass. She heard her lover groan in Eileen's deep, Brazilian voice, "You're such a good girl... take my thick seed..." and pant and grunt with satisfaction as he pumped her full of his cum, seeing Eileen's cum drip from between the nanny's legs at the same time. Ty felt her own orgasm take hold and clenched around the cock ejaculating inside her.