Rudy got romantic only after assault, imo
I don't think Rudy went there with a conscious intent to rape and kill one of the girls that lived there. But I do think he had a subconscious desire to do just that. Most burglars try to keep the amount of time in their victims home to as little as possible. They don't stop to take a dump. This guy grabbed a knife at Ms Prato's nursery. Rudy kept putting him in situations that eventually led to a murder.
While Guede would have had Romanelli's window as a possible escape route, this would have been an undesirable exit point for someone in a rush to get out. The front door would have been far preferable, since for anyone passing or watching outside the cottage, a man walking (or even running) out of the front door of a premises is a normal and unremarkable thing - whereas a man jumping or climbing out of the upper window of a premises is most certainly a remarkable and unusual thing, and would very possibly have prompted someone raising the alarm and noting Guede's appearance.
So I believe that if Guede had been on the toilet when Kercher arrived home, his instinct was to try to exit via the front door. He had no reason to think it would not be easy to open the same door through which Kercher had entered only moments earlier. He would not have known that the door had a faulty latch which meant that the residents locked the door with the mortice lock as a matter of course. He would have thought that he could just turn the latch, open the door and walk out. I think that this is exactly what he tried to do, and when the door wouldn't open, he perhaps started trying to force it, and that the noise of this alerted Kercher.
Once Kercher had come to investigate and encountered Guede, I think two things kicked in. Firstly, Guede knew that he'd now been recognised and caught in the act, which totally changed everything. And secondly, he was now suddenly presented with an opportunity of a cornered, vulnerable, attractive young woman on her own in house on the outskirts of town. I think that a potent mixture of fear, sexual lust and the urge to impose power/control over Kercher quickly started to grip Guede at this point.
I therefore disagree that Guede might have had some sort of sexual assault in mind when he first cased up and entered the cottage. I think his sole motive was burglary. He may have taken into account the fact that the cottage was occupied by four girls (and that the boys in the downstairs cottage were all away for the long weekend), inasmuch as he reasoned that there was less chance of him being cornered and overpowered if the occupants returned while he was inside.And I also think there may possibly have been an element of "revenge" in his choice of the girls' cottage: he may have been hurt and emasculated by the girls' lack of interest in him when he'd encountered them in bars and/or in the boys' apartment below, and was doing a form of getting his own back.
Either way, I believe that Guede's motivation only turned to a sexual attack when the opportunity presented itself, in the form of Kercher arriving home alone and an unwanted confrontation when Guede couldn't open the front door. As others have pointed out, there was every possibility in Guede's mind that if any of the occupants were going to return while he was inside, two or more of the girls would have returned together, or even with men in tow. And I think that even when Kercher returned alone, Guede's first instinct would have been to get out without being seen or recognised. Only when he failed to do so, and when Kercher confronted him (and may even have indicated to him that she knew who he was) did things change.
Yes - I think your assessment provides the most likely scenario. There is an understandable enthusiasm for concocting complex motive in this case, but the reality is probably this. The method of entry through Romanelli's window likely demonstrates that Guede was determined to make any possible occupant of the cottage aware of his presence. He would do this in order to provide himself with an opportunity to call off the burglary if the cottage had not been empty when he arrived. If rape had been his initial motive, he would have approached the matter rather differently.
I agree with the rough scenario LJ outlined above, and augmented by Tesla and Kauffer. Except I don't believe that the idea of sexual assault occurred to Rudy until after Meredith was mortally wounded and could no longer offer physical resistance.
The extent of the injuries and bruises Meredith sustained shows she fought hard to live. Also, the heavy bruising to her mouth in particular suggests to me Rudy was trying to silence her from yelling, as IIRC he wove the element of her screaming into his narrative.
1. So I have it that Rudy came to burgle, in the bizarro way he does, by making himself at home in the places he robs.
2. When he's in the bathroom and Meredith comes home, he tries to leave out the front door, but the door is locked.
3. He tries to force or jimmy it open, and the noise brings Meredith's attention. (Meredith may even have stopped in the kitchen and eaten a mushroom from the fridge, while Rudy was on the toilet.)
4. BUt Meredith was found in her bedroom, with her jacket on (?) and hadn't had time to take her outside clothes off. This suggests she looked and saw Rudy, realized she was trapped, and started yelling for help in her bedroom and maybe trying to lock the bedroom door. At that point Rudy can't talk his way out of it anymore because Meredith is screaming (unlike Milan where he told the lady not to panic), so he HAS TO QUIET HER, hence the violent assault, and escalating to Rudy putting the knife to her throat.
(Remember the CCTV footage from OGGI, showing multiple people in the parking garage at about that time, all looking in the direction of the cottage? Meredith continuing to scream throughout the assault, right up until Rudy stabbed her, would be consistent).
5. If she is continuing to scream with the knife at her throat, Rudy's only choice to silence her is to actually USE the knife, as he has in the past (IIRC Rudy had scars from knife fights on his stomach?). At any rate, its clear Rudy killed Meredith with his knife in this incident.
6. Only then as Meredith is dying, does Rudy make a decision to take advantage of the opportunity to commit a sexual assault. He repositions her body, partially undresses her, and digitally possibly orally rapes her.
7. But he can't get hard. So he masturbates over her to complete his satisfaction.
8. He then tries to clean up the mess, goes to the bathroom to rinse off blood from his pants and shoes. Grabs the now bloody towels, to hide them and conceal the discovery of the act as long as possible.
9. Comes back into the bedroom and puts the duvet over Meredith, sits on the bed to collect his thoughts. Gets back to the business of stealing money, credit cards and cell phones.
10. Realizes he can leave. Takes Meredith's keys, and see Silenzie's keys on the ring (don't know how he would know this, unless he's seen Silenzie use the keys before, or they're marked in some way).
And Rudy heads downstairs, maybe to rob, maybe to look for a change of clothes. But the DNA and blood from downstairs, and the condition of the apartment being different from how it was left, make it a pretty good bet that Rudy went there after he left the upstairs apartment.
11. Check the timeline for this scenario. Rudy is tossing the phones in Lana's garden by what, 10:15pm?