Damn, some of you guys are pretty freaking harsh.
The fact that she has her infant son in bed with her is not a problem. Why would it be? If she is comfortable with him there then... so? If the child is still there when he is 6 (unless it is a matter of economy which sometimes life has a way of doing that to people) then I would raise an eyebrow but even then, WTF am I to pass judgment if it is working FOR THEM?
As for her boinking another adult consentually.... so? She is a grown woman supporting herself and her son. She doesn't need to give explanations to anyone - period.
Ms Heatherrae - I can completely understand your feelings. You want a particular component of an adult relationship (sex, which is a very strong biological urge) but aren't ready to give/risk all of yourself and that is why you are opting for these types of infrequent situations. As for dating... what's the rush? No one WANTS to be alone forever, but your feelings of not wanting to give up any of your "mommy" time to opt for finding a perspective life partner are completely normal. So why fight them? Take this time to be YOU singular before you concentrate of finding a YOU plural.
And may I offer you a bit of unsolicited advice to avoid the BS on elite C&C? The Old Grump says, come to Texas and bring the baby. WE will gladly watch him while you go on your date here. We live in a suburb of Dallas.

They have carseats for Harleys... right?