The Young and the Restless (Y&R) spoilers reveal that Lily Winters’ (Christel Khalil) concerns about Daniel Romalotti Jr. (Michael Graziadei) and Heather Stevens’ (Vail Bloom) connection are only going to grow stronger.

Although Lily’s been trying to act nonchalant about Daniel’s relationship with his former flame, things have changed now that Heather has officially moved back to town with Lucy Romalotti (Lily Brooks O’Briant).

When Lily walked in on Daniel’s conversation with Heather and Lucy at his new place, it was easy to see them looking like a happy family and feel like an outsider.

Daniel has assured Lucy that she’s welcome to stay every night if she wants, especially since it’ll take some time before Lucy and Heather’s new apartment is available.

Heather will be staying at the GCAC for now, but Daniel could easily worry about her staying there all alone.

Although Daniel will enjoy the extra bonding time with Lucy, he won’t want Heather to feel left out – particularly since she just moved back to GC and is trying to get reacclimated.

There’ll no doubt be some family nights coming up where Daniel reconnects with Heather and Lucy at his penthouse.

When Lucy goes to bed one of those nights, Heather might announce that she should probably head back to her suite.

Daniel could easily encourage Heather to stay a bit longer as they guzzle wine and reminisce. This storyline has to be building somewhere, so there are a couple of options to consider.

One possibility is that Daniel might actually take Heather to bed with him and cheat on Lily.

Another one is that Daniel might get caught in a rather compromising position with Heather, even if they don’t actually take that cheating step.

Lily might arrive and find Heather underneath a blanket with Daniel after falling asleep or something along those lines.

Then again, perhaps Daniel will invite Heather to stay in one of the guest rooms and set the stage for her to answer the door to Lily the next morning!

Bottom line, there’s probably going to be a scenario where Lily realizes Heather has slept over, so she may object to that and insist Daniel’s crossing a line here.

It’s one thing for Daniel to continue to be a family with Heather and Lucy; it’s quite another for Heather to sleep at Daniel’s home when he’s got another girlfriend he’s committed to.

Since Christel Khalil’s maternity leave is coming up, it looks like Y&R will keep inching Lily and Daniel closer to a major relationship blowup.

That could give Lily a reason to leave town and clear her head, especially if there’s some business assignment she’s needed for elsewhere.

The Young and the Restless spoilers say Daniel and Lily’s romance seems poised to crumble, so stay tuned for updates on any breakup news that might be looming.