The first few months of their new living arrangement proved to work out just fine, for the most part. Despite Mike's initial reservations about the arrangement he quickly grew more comfortable. True to her promise Wendy didn't meddle or get too involved in their business and neither Mike nor Cindy felt burdened or awkward with her around.
Probably the best part for him was that Wendy and Cindy hit it off right away. They rapidly became much more like good friends than the usual in-law relationship. While Mike settled in at his new job they seemed to bond right away. They began going out shopping together or on other outings without Mike and had even gone on a few "girl's nights" leaving Mike at home.
In spite of this Mike couldn't deny there had been a few times when things seemed a little awkward between him and his mom. The first such incident happened about three weeks after they moved in. On that day Cindy had gone to the gym to work out leaving Mike and Wendy home alone. Mike offered to help her prepare dinner and they began to move around the kitchen chatting happily until the moment when she bent over to retrieve something from the bottom cabinet while Mike stood behind her. Before either really realized it her ass pressed back into his crotch and they remained still like that for a moment as they each seemed momentarily surprised by their position.
"Um, sorry," she offered somewhat awkwardly as she stood back up and turned to face him. Mike just smiled and tried to act like it was no big deal, but he couldn't deny the surge of excitement he felt or how a part of him didn't want her to move. Based on her expression and how unsure she seemed to be acting he guessed that she felt a similar range of emotions.
They finished cooking the meal in silence and Mike was relieved when Cindy returned home a little while later. After dinner Mike quickly lured Cindy up to their bedroom and they immediately fell into a wild, passionate fuck.
There were a few other awkward moments like that between Mike and his mom, but for the most part they were rare. For her part Wendy had many of the same concerns when the younger couple moved in. Happily she found that most of the time her own forbidden desires and temptations stayed tucked neatly away in the dark parts of her mind and didn't interfere with day to day life. Still, she couldn't stop herself from continuing to fantasize about Mike during those quiet times when she would lie in bed and softly play with her pussy or touch her own tits.
This all began to change for Wendy one Saturday night. The three of them had been relaxing and watching some videos when Wendy excused herself and went up to bed. All night she had been feeling like a bit of a third wheel and thought it would be nice to give Cindy and Mike some privacy.
Wendy put on her satin pajamas and spent a while lying in bed reading her book before she decided a glass of wine would do nicely to finish off the day. Putting her book down she walked back down the hall and toward the living room. She didn't need to go into the living room to get to the kitchen, but she did pass by the entrance to the room and from there she could easily see most of the room.
She hadn't heard any sounds from the living room for a while and was going to try and discreetly sneak by without even looking in. That changed, however, when she heard the soft moan just before she got to the entry to the living room. Almost as a reaction she looked up and saw that Cindy and Mike were in the middle of a slow fuck on the couch. Both had stripped naked and Cindy currently sat over Mike's lap facing him as she rode up and down his hard cock.
Wendy peeked around the corner instantly excited at the sight before her. Cindy groaned softly again and Wendy could see that Mike had started sucking on her tits as they fucked.
Wendy knew she should leave immediately and not spy on this intimate act, but by now the horny part of her mind had already taken over and so she remained tucked out of sight excitedly watching them fuck. She observed Cindy's slow technique and noticed how it differed from her own style. Cindy moved with a sexual grace and beauty that was very appealing to watch. From her angle she couldn't see between Cindy's legs and she wished for a moment she could see her son's hard cock sliding in and out of Cindy's pussy.
Just thinking of his cock, surely coated with her heavy pussy juices, made Wendy's pussy tingle and made her own wetness increase. Another moan brought her attention back to watching them as Mike renewed his efforts at sucking and licking his wife's tits. She noticed how beautifully formed Cindy's tits were and how they so temptingly hung right in front of Mike as he slowly and lavishly licked and sucked at them drawing her nipples to hard points. Wendy thought back again to how it felt to have Mike sucking on her tits like that and had to suppress her own moan of desire.
The pace of the couple's fuck began to increase as they seemed to near their orgasms. When Cindy started to cum she threw her head back in delight and let out a long sigh. Wendy watched her hips gliding back and forth as she guided Mike's cock for her own maximum pleasure. When she started cumming Mike opened his eyes and Wendy could easily see the lust gleaming in them as he watched Cindy cum.
As soon as she finished her own orgasm she began to pump herself up and down over Mike rapidly as he started to buck his hips in tempo with her. Wendy smiled wickedly to herself thinking of how Cindy must feel right now and knowing that she too would know exactly how to move to bring Mike off. He grunted fairly loudly as he started to cum and Cindy dropped down fully on him so his full length was all the way inside her.
For a few moments they sat quietly like this each breathing heavily from their efforts. They then started to exchange a wild, deep kiss and Wendy could easily see their tongues working back and forth between their mouths. As much as she wanted to stay and watch them she knew that she should leave or risk getting caught.
After she quickly went back to her bedroom without ever getting the glass of wine she crawled in bed and stared at the ceiling for a moment alive with her own excitement. She quickly slipped her hand down between her spread legs and found her dripping wet pussy. It only took a few minutes to bring herself to a strong orgasm as she thought about what she had just seen. Even after cumming she was still so excited that it took her a long while to finally let herself fall asleep. That night she dreamt about being with Mike.